NDLI: Anomalies in the electric field and electric conductivity of the Earth’s crust in relation to the Kultuk Earthquake on Lake Baikal

Content Provider	Springer Nature Link
Author	Moroz, Yu. F. Moroz, T. A.
Copyright Year	2012
Abstract	We analyze the variations in the horizontal and vertical components of the Earth’s electromagnetic field measured at nine points onshore along the southern part of Lake Baikal. It is found that variations with a period of a few tens of seconds have decayed 20 minutes before the earthquake. This is a regional effect. It is observed in the variations of the horizontal magnetic field. The intensity of the effect in the electric field is site-specific, which is due to the nonuniform distribution of electric conductivity in a medium, as revealed by the deep magnetotelluric sounding. The electric field also experiences a coseismic variation associated with the seismic wave. This effect is stronger pronounced in the vertical electric field. The bay-like anomalies that precede and accompany the Kultuk earthquake are revealed in the electric field of intraterrestrial origin and in the behavior of the electric tipper. These anomalies are concurrent with the rise of the ground water level in the borehole. The probable nature of the revealed anomalies is discussed.
Starting Page	421
Ending Page	433
Page Count	13
File Format	PDF
ISSN	10693513
Journal	Izvestiya, Physics of the Solid Earth
Volume Number	48
Issue Number	5
e-ISSN	15556506
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2012-05-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Electrical conductivity electromagnetic field coseismic effect earthquake Geophysics/Geodesy
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Environmental Science

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