Mathematics – Logic
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.302...28l&link_type=abstract
Nature, vol. 302, Mar. 3, 1983, p. 28-33.
Mathematics
Logic
44
Atmospheric Electricity, Earthquakes, Electric Corona, Light Emission, Charge Distribution, Electrical Resistivity, Friction, Geological Faults, Heating
Scientific paper
A theory for the appearance of large charge densities near the earth's surface in the presence of earthquakes measuring at least magnitude 6 is presented. It is suggested that the frictional forces of the shear layer in the rock vaporizes large amounts of water, thereby decreasing conductivity locally. A central conductor is formed which, if it is shallow enough and located near the charge-separated areas of the shear zone, will accumulate charge on its top edge and thereby an electric field at the surface. Enhancement by the earth's potential gradient produces a coronal discharge in the atmosphere over the fault. A supporting factor for the theory is the proven occurrence of charging due to the mechanical disruption of water droplets. Sample calculations are provided for several North American faults, and the types of rocks which would experience the charging phenomena are discussed. Verification tests in fault zones are indicated.
Byerlee James D.
Johnston Malcolm J. S.
Lockner David A.
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