11 results found.
... Science Frontiers ONLINE No. 77: Sep-Oct 1991 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Some Old Geysers Are Not So Faithful Yellowstone's Old Faithful has a namesake in Calistoga, California. This notso-well-known geyser is usually very dependable, erupting every 90 minutes, shooting 350 F water 60 feet into the air. However, some 60 hours before the October 1989, 7.1 -magnitude quake in the San Francisco Bay area, the geyser's period suddenly lengthened to more than 100 minutes. After the quake, it settled back into its usual routine. Prior to two other earthquakes, in 1975 and 1984, the clockwork of Calistoga's Old Faithful also ran slow. (Anonymous; "Unfaithful Geyser," Discover, 12:8 , July 1991.) Comment. Since the quake epicenters were many miles distant from the geyser, how is the geyser's clockwork altered? Somehow, small earth movements must have changed the size of the geyser's water reservoir or, possibly, pressure changes in the surrounding rocks might have reduced the flow of water into the reservoir. Pertinent here are the often-observed changes in well levels and spring flows prior to earthquakes. Reference. Geysers display many anomalies. These are cataloged in GHG1-GHG3 in the book Earthquakes, Tides. For details on ordering, visit: here . From Science Frontiers #77, SEP-OCT 1991 . 1991-2000 William R. Corliss ...
Terms matched: 1 - Score: 200 - 15 May 2017 - URL: /sf077/sf077g16.htm
... Science Frontiers ONLINE No. 86: Mar-Apr 1993 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Geysers As Detectors Of Distant Earthquakes June 1992. Landers, California. An earthquake of magnitude 7.5 shook this small town. In apparent sympathy with the Landers disturbance, seismic activity appeared from one end of California to the other, as well as in Nevada, Utah, Idaho, and Wyoming. The Landers quake stimulated unusual seismicity in the solid black areas. Yellowstone Park, Wyoming. Here, 1100 kilometers from Landers, the geyser Echinus, which had been erupting on a regular schedule of every 56 minutes, went berserk. It didn't settle down for 34 hours. Geyser eruptions are frequently disturbed by nearby quakes, but Landers was hardly nearby! The seismology community. "Those distant shocks have startled seismologists as well as ordinary residents. Conventional thinking, at least among U.S . researchers, holds that stress generated when a fault slips in an earthquake peters out within a distance equal to a couple of times the length of the ruptured fault. For Landers, where about 70 kilometers of fault ruptured, this would amount to only about onetenth of the observed reach." Seismologists are now searching for ways to account for these unexpectedly far-reaching effects. (Monastersky, Richard; "Yellowstone Geyser Shows Quake Effect," Science News, 142:428, 1992. Also: Kerr, Richard A.; "Landers Quake's Long Reach Is Shaking Up Seismologists," Science, 259 ...
Terms matched: 1 - Score: 125 - 15 May 2017 - URL: /sf086/sf086a09.htm
... freighter Cape Horn enroute to Singapore with a cargo of sawn lumber. G. Craig was the helmsman on the Cape Horn during a powerful storm (winds of Force 9-10, seas running 8 meters high). Even at 4 A.M ., the phosphorescence of the breaking sea made it seem like daylight. At 4:30, Craig saw what he thought was a colossal wave forming. It was so large that the vessel seemed certain to capsize. He thought he was a goner. But, strangely, the "wave" closed with the vessel very slowly and seemed to move independently of the rest of the stormy sea. Craig recalled other strange features of the phenomenon: .. .what I had initially mistaken for wave crests were actually widely-spaced 'geysers', dancing on the upper surface and each rising to a height of about 20 feet. dropping to half of it, then rising again. [See Craig's sketch.] Then, suddenly, when all seemed lost, the wind dropped from a full gale to an eerie calm. The "wave" passed -- gently -- and then the storm resumed. The Cape Horn was drenched, but there had been no shattering of glass nor rending of wood. There was some flooding but no more than usual in very heavy seas. Some of the lumber lashed to the deck had been lost, but, overall, damage was minimal. The seemingly catastropic "wave," topped by the peculiar geysers turned out to be only a hollow threat, and the ...
Terms matched: 1 - Score: 55 - 15 May 2017 - URL: /sf134/sf134p10.htm
... Science Frontiers ONLINE No. 71: Sep-Oct 1990 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Wyoming: a periodic spring "Near the base of a limestone cliff in Wyoming's Bridger-Teton National Forest, spring water gushes from an opening for several minutes, stops abruptly, then begins a new cycle a short time later. This is Periodic Spring, whose intermittent flow is a rare geologic phenomenon. The water is cold and clear, an indication that this is not a geyser like Old Faithful; such geysers, of volcanic origin, send forth hot water. Through the years various observers have timed the flows at anywhere from four to twentyfive minutes, with similarly varying dry spells. The intermittent flow is especially regular in late summer and autumn. During stormy periods or when there is heavy snow melt-off, the flow fluctuates but does not stop entirely." At full flow, Periodic Spring discharges about 285 gallons/second into a stream 9 feet wide and 1 feet deep. Periodic Spring, therefore, is fairly impressive, but it is not anomalous. (Mohlenbrock, Robert H.; "Periodic Spring, Wyoming," Natural History, 99: 110, April 1990.) Comment. Siphon action nicely explains periodic springs. Water keeps flowing through the upper loop until the water level in the reservoir drops below the siphon intake. The spring will not flow again until the reservoir fills to the top of the upper loop(level a) again initiating siphon action. Siphon action seems simple ...
Terms matched: 1 - Score: 41 - 15 May 2017 - URL: /sf071/sf071g15.htm
... Science Frontiers ONLINE No. 71: Sep-Oct 1990 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Wyoming: is old faithful a strange attractor?" Eruptions of Old Faithful Geyser are generally perceived as extremely regular events, with variation of eruptive interval being attributed to random noise. The governing equations for such a hydrothermal system are highly non-linear, therefore it is reasonable to assume that such systems are capable of operating in regines that display chaotic behavior. Three-dimensional state-space reconstruction of eruption time data provides strong evidence of a strange attractor quite similar to the Rossler attractor. Establishing the system as chaotic indicates that while one can predict eruptive intervals in the short term, long term predictions regarding Old Faithful's eruptive behavior are impossible, no matter how carefully and accurately the system is modeled. The mean eruptive interval of Old Faithful has changed over time. This is consistent with the behavior of a chaotic system, which by definition must be nonstationary in the mean. Seismic activity is believed to be a perturbation shifting Old Faithful into a new chaotic state with a different shape to the strange attractor. A simple non-linear dynamic model of geyser behavior is proposed that leads to chaotic behavior and is consistent with the observations of eruption interval data for Old Faithful." (Nicholl, Michael, et al; "Is Old Faithful a Strange Attractor?" Eos, 71:466, 1990.) Comment. "Strange attractor" is a specialized term employed in chaos analysis. So, Old Faithful is ...
Terms matched: 1 - Score: 37 - 15 May 2017 - URL: /sf071/sf071g16.htm
... of Solar Flares upon the Potential Gradient Effect of Geological Features upon Geomagnetic Activity Effects of Earthquakes upon the Potential Gradient Effect of Volcanism upon Geomagnetic Activity GG GRAVITATIONAL PHENOMENA GGF VARIATIONS IN GRAVITY Nontidal Variations of the Gravitational Field Periodic Changes in Gravity GGH MAGNETIC HILLS Spook Hill and Kin GH PHENOMENA OF THE HYDROSPHERE GHC UNUSUAL PHENOMENA OF WATER SURFACES GHC1 Foam Strips on Inland Waters GHC2 Streaks, Slicks, Calm Patches GHC3 Stratified Typhoon Waves GHC4 Sudden Whitening of Dead Sea GHC5 Dead Water and Slippery Seas GHC6 Bulging River Surfaces GHC7 Swiftly Traveling Surface Disturbances GHC8 Honeycomb Appearance of Flowing Water Remarkable Convection Patterns in Ponds Long Lines of Microorganisms on the Ocean Surface Massive Foam Accumulations Storm Footprints on the Ocean as Seen from Orbit Remarkable Falling and Rising Lake Levels Parting of the Red Sea Reversal of Niagra Falls and Related Phenomena GHG GEYSERS, PERIODIC WELLS, BLOWING CAVES GHG1 Geysers at Sea GHG2 Geysers and Blowing Wells Correlated with Weather Phenomena GHG3 Geysers and Intermittent Wells Correlated with Tidal Forces GHG4 Cold-Water Geysers and Periodic Springs and Wells [GHQ6] Hydrothermal Earthquake Precursors Hydrothermal Explosions Effect of Earthquakes upon Geyser Activity GHS THE BEWILDERING VARIETY OF TIDES GHS1 Sun-Dominated Tides GHS2 Sea and Lake Seiches... GHS3 Spectacular Tidal Bores GHS4 Diurnal, Triple, and Quadruple Tides GHS5 Long-Period Tides of Unexpected Strengths GHS6 Tides That Precede the Moon Extraordinary Tsunamis Tsunami Cycles GHT OCEAN TURBULENCE AND CIRCULATION PHENOMENA GHT1 Extraordinary Deep Circulation Events GHT2 Sonar-Detected Subsurface Oceanic Structures GHT3 Nonvolcanic Underwater Eruptions GHT4 Anomalous El Ninos GHT5 The Guinea Tide GHT6 Energy Transfer to Hurricanes GHT7 Oceanic Rings and Eddies GHT8 Large-Scale Oceanic Chemical Anomalies Deep ...
Terms matched: 1 - Score: 34 - 15 May 2017 - URL: /cat-geop.htm
... Science Frontiers ONLINE No. 86: Mar-Apr 1993 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology The acoustics of rock art Where did agriculture really begin? Astronomy Meteoric "dust bunnies" Cosmic snowballs and magnetic asteroids Biology Must we die? the medfly's answer How a fly hears what a cricket hears Once more science fiction predicts the future! Rethinking aids Geology Geysers as detectors of distant earthquakes Precariously balanced rocks as earthquake detectors Geophysics An electrical virtuoso The milky sea a.k .a . "white water" A CURIOUS SIGHTING Cloud plumes natural but still a bit anomalous Logic and Mathematics Math's mystery All roads lead to 123 Psychology Hypnosis and skin temperature Hypnosis and basketball Physics Solar radiation and mental illness ...
Terms matched: 1 - Score: 15 - 15 May 2017 - URL: /sf086/index.htm
... Science Frontiers ONLINE No. 157: Jan - Feb 2005 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Discovery of a hidden chamber in the Great Pyramid? Who are what was writing over a million years ago? Astronomy The cosmos is 'unspeakably bizarre' -- if you accept two premises No canals but glassy tubes instead Biology Snowflakes of the sea Ground-squirrel infrared countermeasures The shapes that determine time and memory Geology Geyser-type action of the Oklo natural nuclear reactors Geophysics Rogue waves Pwdre Ser falls again Psychology The profundity of sleep Physics Something's the matter with matter Who digs the Higgs? ...
Terms matched: 1 - Score: 15 - 15 May 2017 - URL: /sf157/index.htm
... Science Frontiers ONLINE No. 145: Jan-Feb 2003 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Viking-introduced biological diversity in North America Who first mapped the West Coast of South America Astronomy Venus: telescopic shape-shifter Do some comets just go "poof" Cosmological voyeurism Biology Eyes: Adaptable, multimasked, and untasked Sperm transporters Knee light not effective? Geology Tunguska Confusion Mining for cosmic coal Geophysics Giant Australian marine incursions Amomalous Geysers Psychology Mind over blood Physics Element 0 ...
Terms matched: 1 - Score: 14 - 15 May 2017 - URL: /sf145/index.htm
... Science Frontiers ONLINE No. 77: Sep-Oct 1991 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology PLIOCENE SCULPTURES OR FREAKS OF NATURE? A PAPER TRAIL FROM ASIA TO THE AMERICAS Astronomy Mercury: the impossible planet Eclipse shadow-band anomalies Biology Supernova theory exploded NO UNKNOWN MONSTERS IN THOSE FIJI UNDERWATER CAVES: NEVERTHELESS, THE MYSTERY DEEPENS DO BIRDS USE GENETIC MAPS DURING MIGRATION? Cooler heads, bigger brains? The aye-aye, a percussive forager identical Geology VALLEYS OF DEATH AND ELEPHANT GRAVEYARDS Anthracite man? METHANE HYDRATE: PAST FRIEND OR FUTURE FOE? The gruyerizaton of switzerland faulting Geophysics CROP CIRCLES: DAISY PATTERNS AND A RED BALL OF LIGHT Hovering ball of fire SOME OLD GEYSERS ARE NOT SO FAITHFUL WATER'S MEMORY OR BENVENISTE STRIKES BACK Physics Drip, drop, drup, dr** ...
Terms matched: 1 - Score: 14 - 15 May 2017 - URL: /sf077/index.htm
... Science Frontiers ONLINE No. 111: May-Jun 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Exotic Seismic Signals Not all terrestrial tremors emanate from buckling crust and slipping tectonic plates. The crashing of large waves on a seashore sends "microseisms" to sensitive instruments hundreds of kilometers away. The bubblings of Old Faithful geyser give rise to an enduring and engaging "harmonic tremor." As for the more "exotic" sources of seismic signals, they had an entire session devoted to them at the Fall 1996 meeting of the American Geophysical Union. Here are two of the unusual seismic events presented there. July 10, 1996. Yosemite National Park. "At 6:52 pm PDT Wednesday, July 10, 1996, a large block of granite, with an estimated mass of 80,000 to 184,000 tons, detached from the cliff between Washburn Point and Glacier Point, in Yosemite Valley. The rock mass subsequently launched from the cliff and free-fell ballistically an estimated 550 m before impacting approximately 30 meters from the base of the cliff in the Happy Isles area of the valley floor in Yosemite National Park...This rock fall was well recorded by 3 UC Berkeley (BDSN) and Caltech (TERRAscope) broadband seismographic stations and 15 shortperiod seismographic stations (operated by the USGS in Menlo Park and the University of Nevada, Reno). In fact, it is the largest vertical rock free-fall ever recorded seismically and it registered on seismographs up to 200 km distant." (Uhrhammer, ...
Terms matched: 1 - Score: 13 - 15 May 2017 - URL: /sf111/sf111p12.htm