Physics
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985georl..12..211l&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 12, April 1985, p. 211-214.
Physics
10
Earthquakes, Electric Charge, Electrical Resistivity, Light Emission, San Andreas Fault, Electric Fields, Fourier Transformation
Scientific paper
The complex resistivity of two water-saturated San Andreas fault gouges from 0.001 to 1,000,000 Hz, and confining pressures of 0.2 to 200 MPa are measured. Consistent with earlier observations of clays and common rocks, large low frequency permittivities were observed in all cases. Comparisons were made to induced polarization (IP) measurements by inversion of the data into the time domain, where it was found that principal features of the IP response curves were due to these large low frequency permittivities. The results also suggest that, following large earthquakes, significant electrical charge could remain for many seconds and could result in a variety of reported electromagnetic effects.
Byerlee James D.
Lockner David A.
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