Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type receiver
Patent
1996-09-10
1998-09-22
Snow, Walter E.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type receiver
324323, 324345, 324348, G01V 308, G01V 340
Patent
active
058119744
ABSTRACT:
The present invention relates to realize a tectonic activity monitoring equipment providing apparatus and method to detect a feeble electromagnetic wave occurred by the tectonic activity with a high signal-to-noise ratio (S/N) and to predict earthquake and volcano eruption. The apparatus and the method for monitoring tectonic activity of the present invention comprises electromagnetic wave sensors and one or more of amplifiers for amplifying signals detected by the sensors. And an observation frequency for detecting electromagnetic wave occurred from tectonic activity is set to a frequency between a few tens Hz and 1 kHz so as to eliminate the influence of noises of a strong radiation power less than a few tens Hz and tropical thunder noises of more than 1 kHz of higher order modes propagating between the earth and the ionosphere.
REFERENCES:
patent: 3136943 (1964-06-01), Slichter
patent: 4825165 (1989-04-01), Helms et al.
Masayasu Hata and Deiji Yabashi, 1994, Observation of ELF Radiation Related to Volcanic and Earthquake Activities. Electromagnetic Phenomena Related to Earthquake Prediction, pp. 159-174.
Research Development Corporation of Japan
Snow Walter E.
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