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... Science Frontiers ONLINE No. 41: Sep-Oct 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Anatomy Of A Magnetic Field Reversal "A highly detailed record of both the direction and intensity of the Earth's magnetic field as it reverses has been obtained from a Miocene volcanic sequence. The transitional field is low in intensity and is typically non-axisymmetric. Geomagnetic impulses corresponding to astonishingly high rates of change of the field sometimes occur, suggesting that liquid velocity within the Earth's core increases during geomagnetic reversals." The time period required for the field to reverse was about 4500 years, as measured at Steens Mountain, Oregon. There were three periods of very rapid change (impulses), which hint at radical changes in ... core. The average magnetic field at the earth's surface decreased to 20% of normal during the reversal. (Prevot, Michel, et al; "How the Geomagnetic Field Vector Reverses Polarity," Nature, 316:230, 1985.) Comment. The illustration reveals that the reversal was far from a clean 180 flip; there was much meandering. Just what was happening in the core during the reversal is a mystery. When the magnetic field dropped to low levels, flux of cosmic rays and other radiation at the earth's surface probably increased drastically. Terrestrial life might have been adversely affected. The Steene Mountains directional record. The numbers refer to the samples used from the volcanic sequence, in order of increasing age. Dotted lines represent field directions in the opposite ...
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... Science Frontiers ONLINE No. 53: Sep-Oct 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Meteor-impact winters, magnetic field reversals and tektites "Nuclear winter" is a term now in vogue. And, believe it or not, the rains of tektites discussed below may have been the forerunners of climatic catastrophes similar to the postulated nuclear winters. We shall call them "meteor-impact winters. First, a tad of background: Great meteor impacts and tektite events seem to have occurred nearly simultaneously with deep-cutting biological extinctions and reversals of the earth's magnetic field. Ever since this apparent synchrony was recognized a few decades ago, theorists have been vying in generating scientific scenarios, especially some mechanism that would reverse ... earth's magnetic field. New entrants in the lists are R. Muller and D. Morris, two Berkeley physicists. Here is how they see it: "A sufficiently large asteroid or cometary nucleus hitting the Earth lofts enough dust to set off something like a 'nuclear winter.' The cold persists long after the dust settles because of the increased reflectivity of the snow-covered continents. In the course of a few centuries, enough equatorial ocean water is transported to the polar ice caps to drop the sea level about 10 meters and thus reduce the moment of inertia of the solid outer reaches of the Earth (crust and mantle) by a part in a million. 'That doesn't sound like much, Morris told us. 'But when we realized that this ...
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... Science Frontiers ONLINE No. 135: MAY-JUN 2001 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Sourceless Magnetic Fields?Our pocket compasses attest to the reality of the earth's magnetic field, and astronomers can also measure the magnetic fields of the sun and some other stars. Plasmas streaming along the Milky Way's spiral arms also create galactic magnetic fields. But nowhere in the immense distances between the galaxies do astronomers see anything that might generate even a few lines of magnetic force. Nevertheless, intergalactic magnetic fields do exist. Furthermore, they are just as strong as the magnetic fields measured in the ponderously swirling, star-rich galaxies. Given the great volume of intergalactic space, we cannot ignore these apparently sourceless magnetic fields ... Because, as astrophysicist S.A . Colgate observes: These magnetic fields are the dominant free energy of the universe. If so much energy pervades intergalactic space, it is there that we may find of the source of those perplexing high-energy cosmic rays mentioned in the preceding item. (Musser, George; "Magnetic Anomalies," Scientific American, 283 :22 , August 2000.) Comment. Imagine that! Cosmic rays of incomprehensible energy emanating from a region where resides the dominant free energy of the universe. And yet, we see nothing there in our telescopes. Future science is going to be littered with the fragments of smashed paradigms. From Science Frontiers #135, MAY-JUN 2001 . 2001 William R. Corliss Other Sites of Interest SIS . Catastrophism, archaeoastronomy ...
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... Science Frontiers ONLINE No. 70: Jul-Aug 1990 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Tilted Planetary Magnetic Fields The axis of the earth's magnetic field is tilted about 11 away from our planet's axis of rotation. This tilt is embarrassing to the reigning "dynamo theory," in which the axes of the magnetic field and rotation are presumed to be aligned. The situation is even worse with some the other planets; viz., Uranus with 60 and Neptune with 47 . Jupiter's tilt is 10 , while Saturn's is only 1 . Clearly, something is awry. Two possibilities are: (1 ) The dynamo theory is incorrect; or (2 ) The magnetic fields measured by spacecraft ... actually combinations of central, dynamocreated, dipole fields, which are aligned with the axes of rotation, and "other" dipole fields originating in the outermost portions of the planetary cores. If the latter solution to the dilemma is correct, we must account for the origin and disposition of these "other" dipoles. (Eberhart, J.; "Straightening the Magnetic Tilts of Planets," Science News, 137:294, 1990.) Reference. The anomalously titled magnetic fields of planets are cataloged in The Moon and the Planets. For details on this book, visit: here . From Science Frontiers #70, JUL-AUG 1990 . 1990-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 53: Sep-Oct 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Magnetic Fields And The Imagination "12 male and 12 female volunteers were evaluated for their suggestibility before and after an approximately 15-min. exposure to either sham, 1-Hz or 4-Hz magnetic fields that were applied across their mid-superior temporal lobes. During the field application, subjects were instructed to view a green light that was pulsating at the same frequency as the field and to imagine encountering an alien situation. Results were commensurate with the hypothesis that weak brain-frequency fields may influence certain aspects of imaginings and alter suggestibility." (De Sano, Christine F., and Persinger, M.A .; ... Geophysical Variables and Behavior: XXXIX. Alterations in Imaginings and Suggestibility during Brief Magnetic Field Exposures," Perceptual and Motor Skills , 64:968, 1987.) Comment. The import of this paper is written between the lines of the Summary . One of the authors (M .A .P .) has long been investigating the possibility that UFOs, earthquake lights, and nocturnal lights are basically hallucinatory and are stimulated by natural variations in the magnetic field. From Science Frontiers #53, SEP-OCT 1987 . 1987-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 32: Mar-Apr 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Earth's magnetic field jerks "It now seems almost certain that around 1969 a spectacular change took place in the geomagnetic field. The change was almost synchronous over the whole of the Earth's surface, took place in less than two years, and is now known to have consisted of a 'jerk': a step change in secular acceleration of the magnetic field that has its origin inside the Earth." (Whaler, K.A .; "Geomagnetic Impulses and Deep Mantle Conductivity," Nature, 306:117, 1983.) Comment. No one really knows just how a "jerk" in the magnetic ... is initiated; in fact, the origin of the geomagnetic field as a whole is not well-understood. From Science Frontiers #32, MAR-APR 1984 . 1984-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 66: Nov-Dec 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Neptune Spins Too Fast And Its Magnetic Field Is Awry Some pre-Voyager theories about Neptune have been severely tried by the data trickling back to earth across the great gulf separating us from what is now the most distant planet. Before Voyager, Neptune's spin period was believed to be about 17 hours. This was just the spin rate needed by theorists to explain why Neptune radiates much more heat than Uranus. It seems that spin rate is related to the mixing of a planet's molten innards, which in turn affects the rate at which heat reaches the surface where it is radiated away. With Neptune's period now ... at 16 hours by Voyager's measurements, the mixing-cooling theory is in trouble. The magnetic-field situation is in even worse shape. When planetary scientists found that Uranus' magnetic field was tilted 60 from the axis of rotation, they worried a bit but didn't think that this one exception would overthrow the favored dynamo theory of field generation. After all, the magnetic fields of Jupiter, Saturn, and earth are reasonably well-behaved. But Neptune's field is now found to be misaligned by 50 ! The confidence of the planetologists has now been shaken. What, if anything, is different about Neptune and Uranus? It may just be that we don't really know how the magnetic field of any planet is generated. (Kerr, Richard ...
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... Science Frontiers ONLINE No. 22: Jul-Aug 1982 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Large changes of the earth's magnetic fields in historical times By measuring the magnetic properties of bricks and other accurately dated human artifacts, geophysicists can reconstruct the history of the local magnetic field. Near Loyang, China, the field was as much as 54% higher in 300 A.D . than it is now. It was 15% higher in 1500 A.D . In 1000, it was less than today's value. (Wei, Q.Y ., et al; "Intensity of the Geomagnetic Field near Loyang, China, between 500 BC and AD 1900," Nature, 296:728, ... .) Comment. Direct measurements of the earth's field go back only a few hundred years, but they are consistent with the data reconstructed from artifacts, both showing a steady decrease since 1500. No one has estimated the effects of these substantial changes on radiocarbon dating and, perhaps, human biology. From Science Frontiers #22, JUL-AUG 1982 . 1982-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 53: Sep-Oct 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Magnetic "dead" reckoning Try on this theory for size. Whales subconsciously strand and kill themselves in order to maintain their populations at optimum levels! Well, the dozen or so other theories that have been advanced to account for whale strandings haven't been much better. M. Klinowska thinks that she has some clues indicating a better theory. First, all whale strandings (in Britain, at least) occur where magnetic field contours are perpendicular to the shoreline. Second, strandings are also correlated with irregular changes in the magnetic field. You will see the significance of these facts after you hear her theory. "Cetaceans use the ... geomagnetic field of the Earth as a map. A timer, also based on this field, allows them to monitor their position and progress on the map. They are not using the directional information of the Earth's field, as we do with our compasses, but small relative differences in the total local field. I arrived at this explanation after a detailed analysis of the records of strandings in Britain, but it has so far been confirmed by two groups working in the U.S . Similar work is in progress in other parts of the world. "The total magnetic field of the Earth is not uniform. It is distorted by the underlying geology, forming a topography of magnetic 'hills and valleys.' My analysis shows that the animals move along the contours of these ...
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... Science Frontiers ONLINE No. 100: Jul-Aug 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Kobe quake jostles the geo- magnetic field Some luminous phenomena accompanying the January 17, 1995, Kobe earthquake were mentioned in SF#99. Geomagnetic perturbations were also recorded: "At Kyoto University's observatory in Mineyama, the terrestrial magnetism suddenly changed in a southeasterly direction by up to 0.6 nanotesla, for 30 seconds, as the quake began at 5:46 a.m . on Jan. 17. .. .. . "A similar geomagnetic variation was also observed at the university's observatory in Shigaraki, but the variation was in the opposite, north-westerly, direction." (Anonymous; ... Changes in Geomagnetic Field Noted during Quake," Daily Yomiuri , March 30, 1995. Cr. N. Masuya) Comment. Such clear-cut, earthquake-associated geomagnetic perturbations are rare. For a short history of the controversy, see GQM1 in the catalog volume: Earthquakes, Tides, etc. (Details here .) Evidently, strong earth currents are created when rocks fracture and slip, but the precise mechanism remains obscure. From Science Frontiers #100, JUL-AUG 1995 . 1995-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 68: Mar-Apr 1990 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Magnetic bacteria in the soil and who knows where else?It is already well-established that saltand fresh-water sediments harbor bacteria that synthesize grains of magnetite - presumably for the purpose of sensing the ambient magnetic field and orienting themselves. Similar bacteria have recently been discovered living in ordinary soil in Bavaria. It is near-certain that they will now be found just about everywhere. J.W .E . Fassbinder et al, who reported the Bavarian bacteria, conclude their Abstract with: "We suggest that the magnetic bacteria and their magnetofossils can contribute to the magnetic properties of soils." (Fassbinder, Jorg W.E ... , et al; "Occurrence of Magnetic Bacteria in Soil." Nature, 343:161, 1990.) Comment. It is easy to reach great heights of speculation given the facts that: (1 ) magnetic bacteria exist; (2 ) bacteria in general are exceedingly abundant; and (3 ) bacteria are found deep inside the earth's crust and, seemingly, just about anywhere one cares to look. Now, let's see how ridiculous one can get: Magnetic bacteria and/or their fossils contribute heavily to the magnetic properties of sedimentary rocks and unlithified sediments, such as deep-sea sediments. In fact, magnetostratigraphy and paleomagnetism in general may be based upon bioartifacts and be suspect. Magnetic bacteria and/or their fossils are present in such immense numbers ...
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... Science Frontiers ONLINE No. 12: Fall 1980 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The field is falling, the field is falling NASA's Magnetic Field Satellite has confirmed a trend that goes as far back as Gauss in 1830; namely, that the terrestrial magnetic field is decreasing in strength. At the rate measured by the satellite, the Earth's field will hit zero in about 1200 years. Of course, NASA's scientists warn that the observed decrease may only be a temporary fluctuation. The geological record seems to register a long history of magnetic field reversals, with great biological changes coinciding with the field flips. (Nonymous; "Magsat Down: Magnetic Field Declining," Science News, 117:407 ... Science Frontiers ONLINE No. 12: Fall 1980 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The field is falling, the field is falling NASA's Magnetic Field Satellite has confirmed a trend that goes as far back as Gauss in 1830; namely, that the terrestrial magnetic field is decreasing in strength. At the rate measured by the satellite, the Earth's field will hit zero in about 1200 years. Of course, NASA's scientists warn that the observed decrease may only be a temporary fluctuation. The geological record seems to register a long history of magnetic field reversals, with great biological changes coinciding with the field flips. (Nonymous; "Magsat Down: Magnetic Field Declining," Science News, 117:407 ...
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... Science Frontiers ONLINE No. 38: Mar-Apr 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Whales And Dolphins Trapped Magnetically Joseph L. Kirschvink, of the California Institute of Technology, has plotted the hundreds of beachings of whales and dolphins along the U.S . east coast. He finds that these cetaceans tend to run aground at spots where the earth's magnetic field is diminished by the local magnetic fields of rocks. These coastal magnetic lows are at the ends of long, continuous channels of magnetic minima that run for great distances along the ocean floors. Kirschvink believes that the stranded whales and dolphins were using these magnetic troughs for navigation and failed to see the stop sign at the beaches and ran aground. The mag ... netic troughs in this view are superhighways for animals equipped with a magnetic sense. If Kirschvink's theory is correct, the magnetic sensors of the whales and dolphins are extremely sensitive, because the deepest magnetic troughs are only about 4% weaker than the background magnetic field. Magnetite crystals have been found in birds, fish, and insects, where they are thought to contribute to a magnetic sense of some sort. So far, no magnetite has shown up in whales and dolphins. (Weisburd, S.; "Whales and Dolphins Use Magnetic 'Roads,' Science News, 126:389, 1984.) From Science Frontiers #38, MAR-APR 1985 . 1985-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 52: Jul-Aug 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Complexities Of The Inner Earth So many new and startling facts about the inner earth are emerging from current magnetic, seismic, and gravitic researth that a little list is in order. Bear in mind when going down the list that most of these features would have been considered absurd only a decade or two ago. The earth's solid inner core, which "floats" inside the liquid core, is not spherical. Rather, it is anisotropic with its axis of symmetry aligned with the earth's axis of rotation. (Ref. 1 below) "The CMB (core-mantle boundary) is the most dramatic discontinuity in ... earth's internal structure in terms of the physical and chemical properties as well as the time scale of the processes that take place on either side of it. Its shape, if different from that predicted by the hydrostatic equilibrium theory, may contain information important to our understanding of geodynamic processes in the mantle or the geomagnetic field generated in the outer core." (Ref. 1, and also item #7 below) The earth's magnetic field possesses four lobes which remain fixed relative to the earth's surface, as demonstrated by 300 years of data. These lobes do not drift westward like the general field. (Ref. 2) "Core-spot pairs" of magnetic intensity seem to move westward and poleward. In the southern hemisphere, they originate under the ...
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... Science Frontiers ONLINE No. 36: Nov-Dec 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Magnetic Jerk Problem We reported above that the earth's magnetic field "jerked" in 1969; that is, it suddenly accelerated its westward drift. The earth's core, which through dynamo action reputedly generates the magnetic field we detect at the surface, apparently does not keep pace with the outer crust. It is this sluggishness that produces the observed westward drift of the magnetic field of about 1 meter per hour. While most geophysicists acknowledge that something significant happened to the core in 1969, the geographical extent of the "jerk" is unclear. The acceleration of the field was clearcut in Europe but obscure or undetectable over ... of North America. If the jerk was geographically limited, the core perturbation probably was, too. The earth's core may, in fact, eddy and swirl like the planet's atmosphere. Going over past records, geophysicists think they have spotted another jerk in 1912; only that time the field decelerated. (Kerr, Richard A.; "Magnetic 'Jerk" Gaining Wider Acceptance," Science, 225:1135, 1984.) From Science Frontiers #36, NOV-DEC 1984 . 1984-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 50: Mar-Apr 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Lunar Magnetic Mollusc From the abstract of a paper in Science: "Behavioral experiments indicated that the marine opisthobranch mollusk Tritonia diomedea can derive directional cues from the magnetic field of the earth. The magnetic direction toward which nudibrachs spontaneously oriented in the geomagnetic field showed recurring patterns of variation correlated with lunar phase, suggesting that the behavioral response to magnetism is modulated by circa-lunar rhythm." The magnetic and lunar-phase detectors of this mollusc are not known. In fact, the authors remark in their introductory paragraph that, even in organisms possessing ferromagnetic materials in their systems, there exists no "direct neurophysiological evidence implicating ferromagntic particles in the ... detection of magnetic fields." (Lohmann, Kenneth J., and Willows, A.O . Dennis; "LunarModulated Geomagnetic Orientation by a Marine Mollusk," Science, 235:331, 1987.) From Science Frontiers #50, MAR-APR 1987 . 1987-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 101: Sep-Oct 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects "ALMOST INCONCEIVABLE" CHANGES IN THE GEOMAGNETIC FIELD A decade ago, a trio of geophysicists published a group of papers based on their measurements of the remnant magnetism of the 16-million-year-old layered lava flows at Steens Mountain, Oregon. (SF#45) At that time, they claimed that these finely bedded lava flows testified that, during a field reversal, the earth's field swung around at the astonishing rate of 3 per day! This rate is about one thousand times the current rate of polar drift. Mainstream geophysicists could not believe the 3 /day figure because it implied incredibly rapid changes in the ... Science Frontiers ONLINE No. 101: Sep-Oct 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects "ALMOST INCONCEIVABLE" CHANGES IN THE GEOMAGNETIC FIELD A decade ago, a trio of geophysicists published a group of papers based on their measurements of the remnant magnetism of the 16-million-year-old layered lava flows at Steens Mountain, Oregon. (SF#45) At that time, they claimed that these finely bedded lava flows testified that, during a field reversal, the earth's field swung around at the astonishing rate of 3 per day! This rate is about one thousand times the current rate of polar drift. Mainstream geophysicists could not believe the 3 /day figure because it implied incredibly rapid changes in the ...
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... Science Frontiers ONLINE No. 54: Nov-Dec 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The changing magnetic climate: does it affect civilizations?Abstract. "Past values for the geomagnetic intensity may be obtained by laboratory analysis of the thermoremanent magnetization carried by clay baked in ancient times. From global averages of such determinations it is commonly accepted that the intensity in any given region went through a broad maximum about 2000 years ago, reaching a level about 50% higher than at present. Here we present results obtained from a wide range of Chinese pottery, spanning the interval from 4000 BC to the present, indicating that the field behaviour was more complex. The intensity was high between 1500 and 1000 BC and again in the first ... of the first millennium AD. Comparison with results reported for Western Asia, Egypt and Crete suggests that these high values are due to non-dipole disturbances in the geomagnetic field, consistent with long-term records of the cosmogenic radioisotopes 14C and 10Be." (Quing-Yun, Wei, et al; "Geomagnetic Intensity as Evaluated from Ancient Chinese Pottery," Nature, 328:330, 1987.) Comment. This article stimulates three questions: What caused the geomagnetic changes; could some be of internal origin? Are periods of reduced magnetic fields associated with cultural changes? The graph, for example, reveals a dip during the flowering of Greek civilization. Could such ambient magnetic changes have an effect on human imagination, as reported in laboratory test?. See SF#53 ...
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... Science Frontiers ONLINE No. 50: Mar-Apr 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Magnetic Precursors Of Large Storms On January 22, 1986, a magnetometer at the Fredricksburg Magnetic Observatory, in Virginia, recorded a sudden jump (of 45 gammas) in the earth's horizontal magnetic field component. Alerted to this, G. Wollin, at the Lamont-Doherty Geological Observatory, immediately predicted that a major snowstorm or flooding rains would hit northeastern states within six days. Wollin contacted the weather people in the region, but they discounted the prediction because satellite pictures and conventional weather indicators implied nothing of the sort. A three-day storm began on January 25, depositing 3 feet of snow in northern New England and ... inches of rain along the coast from Washington to Boston. Wollin has had similar successes, without even looking at a weather map! Obviously, Wollin's forecasting techniques are not yet part of the Weather Bureau's arsenal. This is not too surprising because even Wollin does not understand why major storms should be preceded by several days by nervous magnetometers. He talks in a tentative way about solar storms, which do affect terrestrial magnetism, dumping energy into the oceans and thence into the atmosphere. But this is mainly speculation. Historically, we do know that long-term changes in the earth's magnetic field are linked to global temperature levels (see graphs); but here, too, cause and effect are not obvious. (Gribbin, John; "Magnetic Pointers to ...
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... Science Frontiers ONLINE No. 49: Jan-Feb 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Reversed Magnetization In Rocks A fundamental assumption of paleomagnetism is that the natural remanent magnetism (NRM) of rocks is acquired parallel to the applied magnetic field. There are unsettling exceptions: "Andesitic pumice, which was hurled several hundred kilometres during the disasterous 1985 eruption of the Nevado del Ruiz volcano (Columbia), carries a stable but reversed NRM with southerly declination and negative inclination. Heating experiments show that this magnetization is due to a self-reversal mechanism which also induces a reversed thermoremanent magnetization (TRM) in the laboratory field." (Heller, Friedrich, et al; "Reversed Magnetization in Pyroclastics from the 1985 Eruption of Nevado ... Ruiz, Columbia," Nature, 324:241, 1986.) Comment. Much of the evidence for continental drift, especially the paths taken by the continents, is based upon paleomagnetism. From Science Frontiers #49, JAN-FEB 1987 . 1987-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 34: Jul-Aug 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Behind magnetic flip-flops The earth's magnetic field frequently reverses its polarity. Such flips can of-ten be correlated with climate changes, global ice volumes, sea-floor spreading rates, and deposition of black shales, tektite falls, biological extinctions, etc. The frustrating thing is the lack of clear-cut cause and effect; that is, how these phenomena are linked physically to the geomagnetic field. Part of the problem is that we can only guess at how the geomagnetic field is generated. Let us assume that the earth's magnetic field is created by dynamo action in the planet's fluid core. ... . Olson finds analytically that the core dynamo may reverse sign due to fluctuations in core turbulence caused by two competing energy sources: heat loss at the mantle-core boundary and progressive growth of the inner core. In concept, the heat lost at the core-mantle boundary might be linked to climate changes and sea-floor spreading. Taking a different tack, D. Gubbins has investigated the possibility that field reversals are triggered by ice ages and meteorite impacts (tektite falls). The physical mechanism here would be the increase in pressure upon the core, which affects the rate of freezing in the outer core, and thus the power available to the core dynamo. Gubbins found that these externally caused pressure changes were too small to explain the polarity changes. However, the parameters involved are ...
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... L .A . MacVicar, at MIT, discovered a remarkable effect: "One interesting and surprising property of electrochemical cells was discovered by accident. Normally, the magnetometer scans each cell as the cell moves horizontally beneath the magnetometer. During one run, the researchers left the cell in a single position for a long time while the magnetometer was still on. After 20 minutes or so, the magnetic field strength began to drop. 'It was very dramatic to watch this field collapse,' says MacVicar. After about a minute at zero, the magnetic field grew larger again but in the opposite direction." These reversals occurred over and over again at regular intervals. (Peterson, I.; "Tracing Corrosion's Magnetic Field," Science News, 130:132, ... .) Comment. The self-reversal of magnetic specimens has been observed before under some conditions, but here is a periodic reversal of an electrochemical system. Why place it under the heading of Geology? Because the earth's field seems to reverse on a fairly regular basis. Catastrophists have invoked as teroid or cometary collions to account for these flip-flops, but it might be that the earth contains giant electrochemical cells that spontaneously reverse on a million-year timescale rather than minutes. We know the earth's crust is filled with brines and other conducting fluids. Who knows what electrochemical activity transpires down there? From Science Frontiers #48, NOV-DEC 1986 . 1986-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 63: May-Jun 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A Magnetic Sense In Mice Orientation responses of mice displaced in a normal geomagnetic field (A & B) and a reversed field (C & D). Mean directions are indicated in the center (a -d ). "Abstract . We displaced white-footed mice ( Peromyscus leucopus ) 40 m away from their home areas and released them in a circular arena. Mice concentrated their exploratory and escape activity in the portion of the arena corresponding to home direction. In another group of mice, we reversed the horizontal com-ponent of the geomagnetic field surrounding them during displacement. These individuals concentrated their activity in areas of the circular ... opposite home direction. Mice were not likely using visual, chemical, or kinesthetic cues to establish home direction. Tissues of P. leucopus exhibit strong isothermal remanant magnetization and may contain biogenic ferromagnetic material. Our results suggest that white footed mice have a magnetic sense and use the geomagnetic field as a compass cue." (August, Peter V., et al; "Magnetic Orientation in a Small Mammal, Peromyscus Leucopus ," Journal of Mammalogy, 70:1 , 1989.) Reference. See BMT1 in Biological Anomalies: Mammals I for more on magnetic orientation and navigation. This book is described here . From Science Frontiers #63, MAY-JUN 1989 . 1989-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 128: MAR-APR 2000 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Ganymede Magnetic Paradox In December 1995, the Galileo space-craft was injected into orbit around Jupiter, thereby becoming the first known artificial satellite of this giant planet. In the five years that have transpired, Galileo has radioed back voluminous data about Jupiter itself and its four large Calilean satellites. These natural satellites have turned out to be a disparate bunch. Three have iron cores, but Callisto breaks the mold with an unusual core of mixed ice and rock. Europa probably possesses an ocean, and Callisto might also. Only one of Jupiter's large satellites, Ganymede, boasts a magnetic field. In fact, Ganymede is apparently ... only satellite in the solar system to display an intrinsic, dipole magnetic field like the earth's . Although Ganymere's magnetic field is like that produced by a permanent bar magnet, its core is much too hot for permanent magnetism. Again like the earth, Ganymede's field is theorized to be generated by the convection of electrically conducting liquid in its core -- a dynamo of sorts. All well and good, but Ganymede is so small that it should have cooled off billions of years ago thereby freezing its metallic core. So then, whence its magnetic field? One way out of this box it to suppose that about a billion years ago Ganymede was circling Jupiter in an orbit that took it much closer to this ponderous planet. Then, Jupiter's powerful gravitational ...
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... Science Frontiers ONLINE No. 55: Jan-Feb 1988 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Migrating Birds Collide With Magnetic Bump Do birds utilize the earth's magnetic field for navigation? Many have so surmised; and there exists anecdotal evidence for it. A Swedish ecologist, T. Almberstam, decided to attempt scientific observations. At Norberg, in central Sweden, a huge deposit of magnetite creates a powerful magnetic anomaly. The deposit is 12 kilometers long by several wide. At low altitudes, the total magnetic intensity of the earth's field is 60% higher than normal. What happens when migrating birds fly into this magnetic bump? "Although Almerstam found that many migrating birds showed no signs of avoiding the Norberg anomaly ... and often managed to keep on the right course as they passed through it, there were definite indications that the birds' orientation might be affected under special circumstances. Some migrants flying at low altitudes, where the magnetic intensity was greatest and the inclination and declination distorted greatly, became disoriented briefly. They nervously landed and then circled around before taking off again. Other birds changed their altitude abruptly, dropping 100 metres in two minutes and breaking up their flock formations." Certainly something is happening, but no one knows what. (Anonmous; "Magnetic Anomaly Upsets Migrating Birds," New Scientist, p. 32, November 5, 1987.) From Science Frontiers #55, JAN-FEB 1988 . 1988-2000 William R. Corliss ...
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... Extreme-Ultraviolet Emissions from Mercury AHO ANOMALOUS TELESCOPIC OBSERVATIONS AHO1 Mercury's Occasional Blunted Cusps AHO2 Terminator Irregularities AHO3 White Projections and Spots AHO4 Dark Linear Markings AHO5 Anomalous Brightness Temperatures AHO6 Ring of Light around Mercury's Dark Side AHX ANOMALIES OBSERVED DURING TRANSITS AHX1 Bright Spots on Mercury during Transit AHX2 Ring around Mercury during Transit AHX3 Illumination of Mercury's Disk during Transit AHZ MERCURY'S ANOMALOUS MAGNETIC FIELD AHZ1 Mercury's Unexpected Magnetic Field AHZ2 Mercury's Offset Magnetic Field AJ JUPITER AJB JOVIAN ORBITAL ANOMALIES AJB1 Cyclic Disturbances of Jupiter's Orbit AJF INTRINSIC RADIATION FROM JUPITER AJF1 Jupiter's Intrinsic Radiation AJF2 Variations in Jupiter's Decametric Radiation AJL JUPITER'S REMARKABLE GALILEAN SATELLITES AND RING AJL1 Pre-Voyager Sightings of Jupiter's Ring AJL2 Io's Bizarre Physical Makeup ... ) Strange reports * Bizarre biology * Anomalous archaeology From New Scientist, Nature, Scientific American, etc Archaeology Astronomy Biology Geology Geophysics Mathematics Psychology Physics Catalog of Anomalies (Subjects)Overview Astronomy Biology Chemistry/Physics Geology Geophysics Logic/mathemitics Archeology Psychology Miscellaneous phenomena Other pages Home Page Science Frontiers Online Science Frontiers: The Book Sourcebook Project A ASTRONOMY Catalog of Anomalies (Astronomy Subjects)Within each of these fields, catalog sections that are already in print are given alphanumerical labels. For example, BHB1 = B (Biology)+ H (Humans)+ B (Behavior)+ 1 (first anomaly in Chapter BHB). Some anomalies and curiosities that are listed below have not yet been cataloged and published in catalog format. These do not have the alphanumerical labels. AA ASTEROIDS AAB CELESTIAL MECHANICS ...
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... Science Frontiers ONLINE No. 80: Mar-Apr 1992 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Steens Mountain Conundrum The layered lava flows of Steens Mountain, in southeastern Oregon, have preserved video-like records of the earth's magnetic field as it switched from one polarity to another about 15.5 million years ago. The scientific "instruments" here are the cooling lava flows. As they solidify from the outside in, a process taking about 2 weeks for a 2meter-thick flow, the lava is magnetized in the direction of the field prevailing at the moment of solidification. We would thus have a 2-week continuous record of the behavior of the earth's field. Ordinarily, we would not expect ... see very much change in 2 weeks; even a reversing field is thought to take thousands of years to complete its flip-flop. However, at Steens Mountain, when the field reversed 15.5 million years ago, the lava flows suggest that the field's axis was rotating 3-8 per day -- incredibly fast according to current thinking, in fact a thousand times faster than expected. The conundrum (one might call it a scientific impasse) arises because the flowing electrically conducting fluids that supposedly constitute the earth's dynamo would have to flow at speeds of several kilometers/hour. No one has ever contemplated molten rock moving at such speeds in the core! (Appenzeller, Tim; "A Conundrum at Steens Mountain," Science, 255:31, ...
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... , Block Fields,... ESM6 Elevated Erratics... ESM7 Anomalous Glacial Drift ESM8 Fluidized Debris Slides ESM9 Surging Glaciers ESM10 Driftless Enclaves within Glaciated Regions ESM11 Anomalous Rock Motion ESM12 Superficial Rocky Debris of Doubtful Provenance ESP ANOMALOUS PHYSICAL PHENOMENA IN GEOLOGY ESP1 Anomalous Radiohalos ESP2 Flexible Rocks ESP3 Unusually Colored Rocks ESP4 Noncrushing of Fossils in Sediment Compaction ESP5 Remarkable Polished Rocks ESP6 Ringing Rocks ESP7 Small-Scale Magnetic Anomalies ESP8 Frazil Ice, Anchor Ice,... ESP9 Long-Range Fine Structure In Strata ESP10 Jointing, Cleat, Crack Patterns ESP11 Shocked Mineral Grains at Geological Boundaries ESP12 Radiometric Dating Discordances ESP13 Natural Fission Reactors ESP14 Musical Sands ESP15 Luminous Rocks ESP16 Explosive Rocks ESP17 Dry Quicksand ESP18 Glacieres/Natural Refrigerators ESP19 Radioactive Fossils ESP20 Clustering of Mineralogical Dates in Time and Space ESP21 Random Cracking around ... ) Strange reports * Bizarre biology * Anomalous archaeology From New Scientist, Nature, Scientific American, etc Archaeology Astronomy Biology Geology Geophysics Mathematics Psychology Physics Catalog of Anomalies (Subjects)Overview Astronomy Biology Chemistry/Physics Geology Geophysics Logic/mathemitics Archeology Psychology Miscellaneous phenomena Other pages Home Page Science Frontiers Online Science Frontiers: The Book Sourcebook Project E GEOLOGY Catalog of Anomalies (Geology Subjects)Within each of these fields, catalog sections that are already in print are given alphanumerical labels. For example, BHB1 = B (Biology)+ H (Humans)+ B (Behavior)+ 1 (first anomaly in Chapter BHB). Some anomalies and curiosities that are listed below have not yet been cataloged and published in catalog format. These do not have the alphanumerical labels. EC Chemical and Physical Anomalies ...
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... Science Frontiers ONLINE No. 60: Nov-Dec 1988 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Collision/eruption/extinction/ magnetic reversal An increasingly popular scenario is: (1 ) Every 34 million years the solar system bobs up and down through the thickly populated disk of our galaxy; (2 ) The resulting encounters lead to showers of comets and/or asteroids on earth; (3 ) The mechanic trauma leads to basalt flooding; (4 ) Great biological extinctions occur in consequence; and (5 ) The terrestrial magnetic field reverses in step. Now, if scientists could show that all of these phenomena occur at the same frequency and are roughly in phase, it would constitute one of science's most important syntheses ... The stratigraphic record and the estimated ages of meteor craters certainly hint at such synchrony. Recently, two more papers have appeared which support the above scenario. First, M.R . Rampino and R.B . Stothers show that during the past 250 million years, eleven episodes of basalt flooding have occurred with an average cycle time of 32 million years. Second, J. Negi maintains that the earth's magnetic record boasts a similar string of disturbances, with an average period of 33 million years. (Anonymous; "Regular Reversals in Earth's Magnetic Field A Fluke?" New Scientist, p. 32, August 25, 1988.) From Science Frontiers #60, NOV-DEC 1988 . 1988-2000 William R. Corliss ...
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... All Issues This Issue Sourcebook Project Sourcebook Subjects WHAT'S ANOTHER DIPOLE OR TWO?" Planetary exploration by deep space probes in recent years has shown that the dipole moment of some mag netized planets has a surprisingly large inclination angle with respect to the rotation axis. It is argued that the inclined dipole thus obtained may not be physically realistic. Applying the method we have developed for the source surface magnetic field of the sun (a spherical surface of 2.5 solar radii), it is suggested that the main dipole of the earth and the magnetized planets is actually axial (the magnetic moment is parallel or antiparallel to the rotation axis), and that two or three smaller dipoles near the core surface are responsible for the apparent inclination of the main dipole." (Akasofu, S ... I ., and Saito, T.; "Is the Earth"s Dipole Actually Inclined with Respect to Its Rotation Axis?" Eos, 71: 490, 1990.) Comment. In SF#70, we see that the magnetic field of Uranus is inclined a whopping 60 to its axis of rotation. Can a few, small additional dipoles distort the main field so much? And just what are these small dipoles anyway -- physically and electrically? From Science Frontiers #71, SEP-OCT 1990 . 1990-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 124: Jul-Aug 1999 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Magnetic Stripes On Mars As the Mars Global Surveyor swooped down to altitudes between 100 and 200 kilometers above the Martian surface during its aerobraking orbits, magnetometers detected broad, parallel stripes with alternating magnetic polarity. These stripes across the planet's southern highlands are a great surprise to planetologists because they superficially resemble the magnetic stripes that parallel the rifts along the floors of the earth's oceans where new crust is forming. The obvious implication is that Mars once possessed drifting continents and a geomagnetic dynamo that occasionally reversed its polarity -- just as has supposedly happened and is still happening on earth. Prior to this discovery, Mars was deemed too ... to conclude that Martian continents once sailed ponderously cross the planet's surface, the scientific jury is still out. First of all, the Martian magnetic stripes are substantially different from earth's in shape, pattern, strength, and, above all, size. The Martian stripes are about 200 kilometers wide and 2,000 long -- much larger than earth's . Their magnetic field strength is more than ten times that of the terrestrial stripes. Whatever magnetic phenomena occurred on Mars some 4 billion years ago must have been quite different from what happened on earth 200 million years ago. Yet, no other reasonable explanation has been found for the Martian magnetic stripes. (Acuna, M.H ., et al; "Global Distribution of Crustal Magnetization Discovered by the Mars ...
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... Science Frontiers ONLINE No. 84: Nov-Dec 1992 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Hunt For The Magnetoreceptor When magnetite particles were found in organisms from bacteria to bats, it was assumed that here was the long sought magnetoreceptor which animals used for magnetic navigation. But so far, biologists do not have the slightest notion how such magnetite particles can be turned into a "magnetic sense," which sends the brain information on the direction of the geomagnetic field or, perhaps, draws a magnetic map of sorts. A completely different sort of magnetreceptor is now under investigation, one that humans may also unknowingly possess. It utilizes special photoreceptors that employ an electron-spin resonance process which is modulated by the geomagnetic field. ... of our very sensitive magnetometers use similar phenomena. The biological version of such a receptor would be connected to the brain, as the eye is, and send signals as to the direction of the earth's magnetic field. Sounds interesting, but is there any basis for thinking such a sophisticated gadget could have evolved? It seems that some experiments with newts by J.B . Phillips and S.C . Borland support the idea. The newts were first trained to orient themselves in a certain direction with respect to the geomagnetic field. "When tested under one of four artificial field alignments (magnetic north at geographic north, east, south or west), the newts kept their training directions constant relative to the magnetic rather than the geographic system of reference, but they selected different ...
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... Science Frontiers ONLINE No. 31: Jan-Feb 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Early Life And Magnetism The tiny granules of magnetite found in magnetized sediments come in various crystalline forms. Inorganic magnetite precipitated from molten rock is octahedral, while the particles manufactured by bacteria are cubes, hexagonal prisms, or noncrystalline teardrops. The magnetite found in marine sediments appears to be organically formed -- at least the shapes of the particles are characteristic of bacterial manufacture. Apparently these industrious bacteria have been busy producing magnetite ever since "lowly" life forms appeared in the Precambrian. These facts pose at least four questions: How much of the earth's iron ore has been concentrated biologically and is there a connection with the Gaia Hypothesis ... Is it possible that magnetic field reversals, now believed to be of purely geophysical origin, might be biological artifacts (that is, due to population and/ or species changes of magnetic bacteria)? If magnetic field reversals are of geophysical origin, how do the magnetic bacteria find their food sources during the long periods of near-zero field? Lab experiments prove that magnetic bacteria require free oxygen to secrete magnetite, but the Precambrian atmosphere and oceans were supposedly devoid of oxygen until 2.3 billion years ago. How did the magnetic bacteria prosper before then? (Simon, C.; "Tiniest Fossils May Record Magnetic Field," Science News, 124:308, 1983.) From Science Frontiers #31, JAN-FEB 1984 . 1984-2000 William R. Corliss ...
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... Schizophrenia Correlated with Season of Birth Disturbed Human Activity Correlated with Geomagnetic Field Tickling Phenomena Face Preference Correlated with Menstrual Cycle Curious Crowd Behavior (at Train Platforms) Why Do People Stick Out Their Tongues When Concentrating? Intelligence as a Pathogen Behaviorisms Transmitted by Organ Transplants Meme Phenomena Effect of Music (Mozart's ) on Mental Performance Motherhood Improves Learning and Memory BHC CHEMICAL AND PHYSICAL ANOMALIES BHC1 Electric People BHC2 Magnetic People BHC3 Body Potentials Correlated with Lunar Phase BHC4 Brain Electricity (EEGs) BHC5 Very High Body Temperatures BHC6 Unusual Body-Temperature Cycles BHC7 Anomalous Human Combustion BHC8 Retarded Decay of the Human Body BHC9 Imbalances in Element Ingestion and Excretion BHC10 The Human Inability to Synthesize Ascorbic Acid BHC11 Blood-Chemistry Variations BHC12 The Existence of Blood Polymorphisms BHC13 The Complexity, Variability, and Ubiquity of Hemoglobin BHC14 Geographical ... ) Strange reports * Bizarre biology * Anomalous archaeology From New Scientist, Nature, Scientific American, etc Archaeology Astronomy Biology Geology Geophysics Mathematics Psychology Physics Catalog of Anomalies (Subjects)Overview Astronomy Biology Chemistry/Physics Geology Geophysics Logic/mathemitics Archeology Psychology Miscellaneous phenomena Other pages Home Page Science Frontiers Online Science Frontiers: The Book Sourcebook Project B BIOLOGY Catalog of Anomalies (Biology Subjects)Within each of these fields, catalog sections that are already in print are given alphanumerical labels. For example, BHB1 = B (Biology)+ H (Humans)+ B (Behavior)+ 1 (first anomaly in Chapter BHB). Some anomalies and curiosities that are listed below have not yet been cataloged and published in catalog format. These do not have the alphanumerical labels. BA ARTHROPODS Titles not yet ...
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... Science Frontiers ONLINE No. 21: May-Jun 1982 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Magnetic tune played on saturn's rings The strange dark radial spokes seen in Voyager's photos of Saturn's rings wax and wane with a period of about 621 minutes. This is very close to the rotation period of Saturn's magnetic field. Somehow, the rotating magnetic field interacts with the particles making up the rings, forcing density or reflectivity changes that we see as transitory spokes. It is not yet clear how this magnetic tune is played. (Proco, C.C ., and Danielson, G.E .; "The Periodic Variation of Spokes in Saturn's Rings," Eos, 63 ... 156, 1982.) Comment. Brightness changes have also been noted in the zodiacal light, which is light reflected from particles surrounding the sun. After reading about Saturn's variable spokes, one wonders whether solar-system magnetic fields might be the cause of these mysterious variations in the zodiacal light. From Science Frontiers #21, MAY-JUN 1982 . 1982-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 32: Mar-Apr 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects When The Earth Shifted Gears No one really knows just how the terrestrial magnetic field is generated or why it has reversed its direction so frequently in past geological time. Per-haps there is a clue in the following correlation: "The Mesozoic-Cenozoic histories of reversals in the earth's magnetic field and of periods of widespread anoxia in the ocean basins show a remarkable correlation; periods of black-shale deposition (' anoxic events') occur during lengthy periods without magnetic reversals (' quiet periods'). My assembly of published work indicates a remote connection between quiet periods and anoxic events and suggests its form: Magnetic quiet ... coincide with fast seafloor spreading. During these periods, buoyant spreading ridges displace seawater into broad shelves, thus decreasing earth's albedo and causing global warming. Temperature gradients, and thus density gradients, from pole to equator decrease in surface waters, and the deep ocean currents of oxygenated polar waters wane. Oxygen minimum zones intensify and widen; anoxic conditions throughout entire basins are indicated by black shales deposited in the deep sea. These relations thus suggest that the earth's interior processes and its climates are related and their status recorded by both magnetic polarity and anoxic event chronologies of the earth." (Force, Eric R.; "A Relation among Geomagnetic Reversals, Seafloor Spreading Rate, Paleoclimate, and Black Shales," Eos, 65:18, 1984.) Comment. ...
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... iron and rocks. This seems to be the case, but it has too iron to fit the theory. Astronomers have tried to save the theory by supposing that a large asteroid sideswiped Mercury tearing off part of its outer layer of lighter rocks, leaving the heavier iron core untouched. The theory doesn't say what happened to the debris from this colossal collision. As for Mercury's magnetic field, it is small, only 1% that of the earth. But where does it originate? All of the other planets with magnetic fields (earth, Jupiter, Saturn, Neptune, and Uranus) rotate rapidly and are believed to have molten interiors, allowing fluid dynamos to form. Mercury, in contrast, spins very slowly and seems solid throughout. Therefore, the magnetic dynamos ... supposedly create the fields of other planets cannot exist inside Mercury. (Crosswell, Ken; "Mercury -- the Impossible Planet," New Scientist, p. 26, June 1, 1991.) Comment. Could Mercury be a permanent magnet? M. Stock suggests this in a letter in the July 13 issue of New Scientist.) Reference. Facts about Mercury's anomalous magnetic field may be found in AHZ1 and AHZ2 in our catalog: The Moon and the Planets . Details here . From Science Frontiers #77, SEP-OCT 1991 . 1991-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 104: Mar-Apr 1996 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Magnetic Mountain To find the "magnetic mountain," you must venture out into the Gulf of California about 15 miles east of the Baja Peninsula. Out there, beneath the boat, you can find a basaltic mountain named Espiritu Santo. Next, you don your face mask and descend toward the submerged peak. At about 70 feet, you will likely find yourself surrounded by scores, possibly hundreds, of scalloped hammerheads, some as long as 13 feet. They will ignore you and the teeming fish as they slowly wheel passively around the submerged mountain. Why do these big sharks congregate in this spot? Marine biologists have been asking ... find their way back so unerringly? Furthermore, by tracking the tagged fish, the researchers found the sharks often precisely followed the same paths in what seemed a featureless ocean. How did they do it? It was quickly ruled out that they were following specific ocean currents or the bottom topography. The hammerheads seemed to possess some sort of unrecognized navigation sense. Suspecting they might be sensing the geomagnetic field, Klimley began towing a magne tometer behind the boat. Sure enough, the hammerheads were following paths coincident with lines of high magnetic gradient. And Espiritu Santo itself turned out to be a sort of magnetic beacon from which radiated these magnetic "paths" that the hammerheads followed so exactly. Now the question became: How do hammerheads -- and perhaps other animals -- sense such exceedingly ...
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... Science Frontiers ONLINE No. 47: Sep-Oct 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Magnetic Theory Of Dowsing The following two paragraphs were taken from a letter to Nature: "David Marks, in The Skeptical Inquirer, asserts that there are no theories to account for paranormal effects. This is not true for dowsing. Serious dowsing claims, such as those made by Soviet geologists, which are difficult to account for in terms of the reception of normal sensory cues, may be explained by postulating human sensitivity to small magnetic field gradient changes. The theory is supported by a series of tests involving 150 subjects. "The magnetic theory predicts that dowsers can achieve above-chance re sults only if the features they claim to detect ... associated with magnetic gradients of at least one nanotesla per metre. This was not the case in Randi's recent experiments, so his chance results are therefore consistent with the magnetic theory, which merits further investigation." (Williamson, Tom; "Dowsing Explained," Nature, 320:569, 1985.) From Science Frontiers #47, SEP-OCT 1986 . 1986-2000 William R. Corliss ...
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... 6 days). What is surprising is that the energy detected radiating from the two hot spots is all reradiated solar energy; that is, there seems to be no contribution at all from Mercury's core! If no heat is leaking out of Mercury's core, the core itself is very likely solid. If it is solid, it cannot establish convection cells and thus generate a magnetic field through dynamo action. But back in 1975, the Mariner 10 spacecraft radioed back that Mercury actually does possess a magnetic field, and a surprisingly large one at that. (Wilford, John Noble; "Theory of Mercury's Hot Poles Is Shown to Be a Fact," New York Times, June 13, 1990. Cr. J. Covey.) Comment. Something ... clearly awry. This inconsistency could mean that the dynamo theory presumed to be responsible for planetary magnetic fields is incorrect. Reference. Mercury's anomalous magnetic field is cataloged in section AHZ in our catalog: The Moon and the Planets. To order, visit: here . From Science Frontiers #71, SEP-OCT 1990 . 1990-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 78: Nov-Dec 1991 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Meteoroid impacts: the other side of the story Astronomers have long puzzled over the origin of localized magnetic anomalies on the moon. These magnetic concentrations (called "magcons") are located precisely on the opposite side of the moon from the larger lunar basins. How could an impact on the moon magnetize the antipodal region? The impact of a large silicate meteoroid at speeds of 10 kilometers/second would not only blast out a big crater but it would also create a huge cloud of hot, partially ionized gas. This hot gas or plasma will conduct electricity and interact with lunar magnetic fields. As the plasma cloud spreads away from the ... site, it acts like a bulldozer, compressing the lunar magnetic fields ahead of it, as it envelopes the whole moon and rushes towards the antipodal point. It drives the compressed mag netic field into the surface, permanently magnetizing the rocks at the antipodal point. Voila! Magcons. (Hood, L.L ., and Huang, Z.; "Formation of Magnetic Anomalies Antipodal to Lunar Impact Basins: Two-Dimensional Model Calculations," Journal of Geophysical Research, 96:9837, 1991.) Comment. The earth also sports scars from the impacts of large meteoroids. Are there magnetic anomalies opposite these craters? Even more interesting to check out would be the holes blasted in the earth's biosphere by the converging masses of hot gases at the an tipodal points. ...
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... All Issues This Issue Sourcebook Project Sourcebook Subjects Huge Underground Electrical Circuit "Geophysicists from the Department of Earth Sciences and the Bureau of Mineral Resources have discovered part of a huge underground circuit near Broken Hill (Australia), which contains electric currents of more than a million amps. "The currents are spread too thinly for power production, but their existence helps account for problems experienced generally in interpreting the magnetic data used to produce geological maps. "The circuit was found using a sensor which detects fluctuating electric fields in the earth's crust. These are created in response to electrical events, such as thunderstorms and the movement of dissolved salts in artesian water." (" Scientists Discover Huge Underground Circuit," Monash Review, p. 10, December 1986, Cr. R.E ... Molnar, The Monash Review is an Australian publication.) Comment. Could it be that a portion of the earth's "permanent" magnetic field is likewise generated by internal electrical currents? Are the ponderously moving internal convection cells and widely accepted dynamo effect really necessary? In other words, could our planet be a huge natural battery based upon geochemical differences? Reference. Earth-current anomalies are cataloged under EZC5 in Inner Earth. Book details here . From Science Frontiers #54, NOV-DEC 1987 . 1987-2000 William R. Corliss ...
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... following news item: "Some 50 scientists recently surveyed southwest Sichuan Province's notorious high-elevation Black Bamboo Ravine, or Heizugou, where people and livestock have vanished. The Beijingbased Xinhua News Agency reports that scientists believe rotting plants found in the cold, humid region give off a poisonous gas, 'suffocating people and making them fall into the abyss.' The experts also explain that the magnetic field at Heizhugou 'is so strong that it is likely to disable compasses and cause plane crashes.'" (Anonymous; "China's 'Bermuda Triangle'," World Press Review , p. 27, July 1995. Cr. C. Masthay.) Comment. Except for the magnetic field part, Black Bamboo Ravine can be assigned to category ESC5 in Anomalies in Geology ... where one also finds Yellowstone's Death Gulch and Java's Poisoned Valley. To order this book, see: here . From Science Frontiers #101 Sep-Oct 1995 . 1995-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 53: Sep-Oct 1987 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology A TSUNAMI AND A PERUVIAN CULTURAL GLITCH Lenses in antiquity Strange craters Astronomy Hypnotic mars The perseus flasher: mystery solved! Three planetary notes Biology Has the second law been repealed? Human direction finding Magnetic "dead" reckoning Another tale of ogopogo Geology Meteor-impact winters, magnetic field reversals and tektites Tektite-like objects at lonar crater, india Geophysics Are the soviet plumes only orographic clouds? Lightning triggered from the magnetosphere Psychology Magnetic fields and the imagination Men in black (mibs) Folie a famille A "MAGICAL GENIUS" Pi and ramanajan A MODEST EXAMPLE OF THE LONG ARM OF SYNCHRONICITY ...
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... Science Frontiers ONLINE No. 96: Nov-Dec 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects On the sun, south is almost everywhere Astronomers have been shocked by the discovery that the sun has no south pole! "Instruments on board the probe Ulysses have been measuring the radial component of the solar magnetic field. The field lines were expected to become more bunched and intense as the probe approached the south pole. 'Instead, the strength of the magnetic field remained absolutely constant,' says Richard Marsden, a project scientist on Ulysses." (Anonymous; "No Solar Pole," New Scientist, p. 11, September 24, 1994.) From Science Frontiers #96, NOV-DEC 1994 . 1994- ... William R. Corliss ...
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... , a rustling mouse would be highlighted. So far, though, biologists have not learned how neurons can multiply signals. The asymmetrical design of the Barn Owl's ears is essential for pinpointing its prey in the dark. (From: Biological Anomalies: Birds) (Helmuth, Laura; "Location Neurons Do Advanced Math," Science, 292:185, 2001.) Hornets Install Magnetic Markers. Hornets of the species Vespa orientalis affix a tiny crystal of magnetic mineral in the roof of each of the brood-rearing cells in their nests. These crystals are roundish and about 0.1 millimeter in diameter. The mineral is ilmenite with the formula: FeTiO3. The purpose of the magnetic crystals is obscure. The favored explanation is that the hornets use them as guides during ... construction -- sort of like those little flags human surveyors set out. This explanation assumes that hornets can somehow sense and make use of the complex magnetic field created by an array of many tiny magnets. Another question asks where the magnetic crystals come from. Do the hornets secrete them like the magnetotactic bacteria or do they gather them from their environments? (Stokroos, Ietse, et al; "Keystone-Like Crystals in Cells of Hornet Combs," Nature, 411:654, 2001.) Comment. It would be so easy to dismiss the hornets' little crystals as just one more animal gee-whiz fact, but we should not. Did the hornets first recognize that magnetic crystals would be useful to them and then set out to find some or, even more remarkably ...
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... Science Frontiers ONLINE No. 7: June 1979 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Unwanted Noise On The Terrestrial Tape Recorder The hypothesis of continental drift and sea-floor spreading depends heavily upon the strip-like magnetic anomalies that parallel the active ocean ridges. Molten material pushing out along these ridges spreads out, solidifies, and is magnetized by the prevailing terrestrial magnetic field. Thus, the spreading sea floor becomes a "tape Recorder" preserving the record of changing terrestrial polarity over the past several hundred million years. As one drills into this thin conveyor-belt/tape-recorder, one would expect to encounter only rocks of one polarity. Not so! Some of the holes drilled by the Deep Sea Drilling Project have passed ... several polarity zones. To illustrate, core 395A from the mid-Atlantic ridge is magnetized normally for the upper 170 meters, reversely for the next 310 meters, and normally again for 40 meters. Is the tape-recorder idea therefore incorrect? Some scientists argue that it is and that the whole modern edifice of plate tectonics is suspect. (Anonymous; "Testing Vine-Matthews," Open Earth, p. 28, April 1979.) From Science Frontiers #7 , June 1979 . 1979-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 27: May-Jun 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A COMPASS IN OUR SINUSES?You may not feel any north-directed nasal twinges, but the thin hard bones lining the human sinuses contain deposits of magnetic ferric iron. This discovery adds man to a long list of organisms from bacteria to birds known to possess localized accumulations of magnetic material. Experiments with these animals, including humans, seem to indicate a widespread ability to detect ambient magnetic fields. Some animals appear to use this sense for navigation. Whether humans do or do not is still a moot question. (Baker, Robin R., et al; "Magnetic Bones in Human Sinuses," Nature, 301: 78 ... 1983.) From Science Frontiers #27, MAY-JUN 1983 . 1983-2000 William R. Corliss ...
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... right-brain homologue of the left-brain "sense of self," something like a transient shortcircuit between brain hemispheres that probably travels along that interconnecting conduit called the "corpus callosum." Repairing to their laboratory at the Laurentian University, Cook and Persinger asked subjects to press a button when they felt a "mystical presence." Unbeknownst to the subjects, they were occasionally exposed to weak magnetic fields. More often than chance would allow, mystical presences (button pushes) correlated with applications of magnetic fields. (Cook, C.M ., and Persinger, M.A .; "Experimental Induction of the "Sensed Presence" in Normal Subjects and an Exceptional Subject," Perceptual and Motor Skills, 85:683, 1997.) Comments. It is difficult to ... whether sensing an unseen presence is fundamentally different from the sense of being stared at by a real person! The implication of the above experiments is that magnetic fields can induce "mystical presences." Magnetic fields are everywhere; certainly around UFOs, probably around Stonehenge and the Oracle at Delphi. The explanatory possibilities here are endless. From Science Frontiers #117, MAY-JUN 1998 . 1998-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 9: Winter 1979 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Have magnets, will travel Homing pigeons seem to possess at least two direction sensors. Years of experiments with released birds have proved that they use sun compasses on sunny days but have magnetic backups for cloudy days. But how do they sense the earth's magnetic field? Paired-coil tests suggested that the pigeon compass resided in the neck or back of the head. Narrowing the search with sensitive magnetometers and two dozen dissected pigeons, the authors discovered tiny bits of tissue containing magnetite crystals. The same tissues contained yellow crystals likely made by the iron-storage protein ferritin, which was probably used in the biological synthesis of the magnetite. ( ... , Charles, et al; "Pigeons Have Magnets," Science, 205:1027, 1979) Comment. Many species of mud bacteria also synthesize magnetite for purposes of orientation, indicating that nature or some directive force used the same strategy in two widely separated species. From Science Frontiers #9 , Winter 1979 . 1979-2000 William R. Corliss ...
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