No. 45: May-Jun 1986
Anomalous electromagnetic radiation has been detected prior to and during several recent earthquakes. T. Ogawa and his colleagues have surveyed these observations briefly and then repaired to the laboratory where they put rocks through the third degree. They concluded:
"It has been demonstrated by the sample rock experiments that the ordinary crustal rocks produced electricity when they were shocked or fractured and radiated EM waves in the frequency range of 10 Hz to 100 kHz. The electric dipole moment to radiate the EM waves was estimated to be 10-14 C m."
(Ogawa, Toshio, et al; "Electromagnetic Radiations from Rocks," Journal of Geophysical Research, 90:6245, 1985.)
Comment. What was not mentioned by Ogawa et al is that it is just this kind of seismoelectricity that may be responsible for many of the sightings of earthquake lights and maybe even some so-called UFOs. Se GLD8 in Lightning, Auroras, Nocturnal Lights. Ordering information here.