Patterns in the daily periodicity of low magnitude seismicity in Kamchatka |
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| Authors: | V A Gavrilov V I Zhuravlev Yu V Morozova |
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| Institution: | 1.Institute of Volcanology and Seismology, Far East Division,Russian Academy of Sciences,Petropavlovsk-Kamchatskii,Russia;2.Institute of Physics of the Earth,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | A daily periodicity in small (K ≤ 8. 0) Kamchatka earthquakes has been detected, with the maximum occurring during the nighttime.
The effect was not observed throughout the area of study, but only in several zones. We show that the results are not affected
by human and weather factors. A hypothesis is put forward to explain the physical causes of the effect, viz., that the daily
periodicity of small earthquakes could be due to natural VLF electromagnetic radiation acting on the geologic medium. It is
pointed out that the effect is related to the previously identified effect of natural electromagnetic radiation modulating
the intensity of geoacoustic emission from rocks. |
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