Methods and results of monitoring of the natural telluric field in the Baikal rift zone |
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| Authors: | Yu F Moroz T A Moroz T Mogi |
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| Institution: | (1) Institute of Volcanic Geology and Geochemistry, Far East Division, Russian Academy of Sciences, bul’v. Piipa 9, Petropavlovsk-Kamchatski, 683006, Russia;(2) Irkutskgeofizika Federal State Unitary Enterprise, Ministry of Natural Resources of the Russian Federation, Irkutsk, Russia;(3) Institute of Seismology and Volcanology, Hokkaido University, Japan |
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| Abstract: | Variations in horizontal and vertical components of the telluric field are studied within the range of periods from a few tens of seconds to diurnal and longer variations. Variations caused by an external ionospheric source are used for studying the geoelectric heterogeneity of the medium. For this purpose, an electric tipper is introduced by analogy with the geomagnetic field and its frequency response is examined. The magnetotelluric impedance is studied using data of remote geomagnetic observatories. According to the data of monitoring of the electric tipper and magnetotelluric impedance, anomalous effects are revealed that can be related to earthquakes with K ≥ 12. A method is developed for the extraction of electric field anomalies produced by intraterrestrial electric sources. |
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