Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent
1992-12-23
1995-02-07
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
324 72, 324323, 324344, 324351, 340601, G01V 300, G01V 308
Patent
active
053878698
ABSTRACT:
An apparatus for measuring transient earth current includes a detection electrode and a second electrode disposed beneath the surface of the earth in vertical alignment with one another at depths greater than those to which electromagnetic waves generated above the surface of the earth having commercial power line frequencies penetrate, such that the electrical resistance between the detection electrode and the second electrode is on the order of several tens of thousands of ohms, and a charge detector for detecting only high frequency components of a current flowing between the detection electrode and the second electrode. On the basis of these detected high frequency components, the likelihood of an occurance of an earthquake may be determined.
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Tectonophysics, 188 (1991) 321-347, P. Varotsos & M. Lazaridou, "Latest Aspects of Earthquake Prediction in Greece . . . ".
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Agency of Industrial Science & Technology, Ministry of Internati
Strecker Gerard R.
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