Model of the singular current source—The indicator of geodynamic processes in Japan in 2009-2011
- 1 Saint Petersburg Branch of the Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences, Saint Petersburg, Russia
Abstract
The calculation method of the location of the singular generalized current source according to synchronous measurements of the magnetic field in the remote points is proposed. It is designed for the continuous monitoring of changes of the degree of electromagnetic heterogeneity of the geophysical environment. Regular fluctuations of the apparent distance to the effective single source were recorded according to the magnetic data of the observatories in Japan 2009-2011. They are connected with the rhythm of the geodynamic processes in the vicinity of the station Kakioka. The most significant decrease in the apparent distance was registered in connection with the seismic activation of the region, including the catastrophic earthquake of March 11, 2011 with a magnitude of M = 9.1. The anomalous behavior of the apparent parameters of the generalized source was displayed not less than two weeks before the earthquake. Characteristic changes of the curves were registered in the period of three months.
- Sobolev, G.A. and Lyubushin, A.A. (2006) Microseismic impulses as earthquake precursors, Izvestiya, Physics of the Solid Earth, 42, 721-733. doi:10.1134/S1069351306090023
- Kopytenko, Yu.A., Ismagilov, V.S., Kopytenko, E.A., Voronov, P.M. and Zaitsev, D.B. (2000) Magnetic location of geomagnetic disturbance sources. Doklady Earth Sciences, 371A, 569-571.
- Moskovskaya, L.F. (2012) Directional and correlation analysis from the geomagnetic monitoring and seismic data on the Boso Peninsula in 2000. Izvestiya, Physics of the Solid Earth, 48, 532-546. doi:10.1134/S1069351312060043
- Gorbatikov, A.V., Molchanov, J.F., Hayakawa, M., Uyeda, S., Hattori, K., Nagao, T., Tanaka, H., Nikolaev, A.V. and Maltsev, P. (2002) Acoustic emission possibly related to earthquakes, observed at Matsushiro, Japan and its implications. In: Hayakawa, M. and Molchanov, O.A., Eds., Seismo Electromagnetics: Lithosphere-Atmosphere-Ionosphere Coupling, TERRAPUB, Tokyo, 1-10.
- Guglielmi, A.V., Tsegmed, B., Potapov, A.S., Kultima J. and Raita, T. (2006) Seismomagnetic signals from the strong Sumatra earthquake. Izvestiya, Physics of the Solid Earth, 42, 921-927. doi:10.1134/S106935130611005X
- Moroz, Yu.F. and Moroz, T.A. (2012) Correlation of the anomalies in the electric field and electric conductivit of the lithosphere to earthquakes in Kamchatka. Izvestiya, Physics of the Solid Earth, 48, 287-296. doi:10.1134/S1069351312010090
- Moskovskaya, L.F. (2007) Impedance-admittance regression analysis of magnetotelluric fields. Izvestiya, Physics of the Solid Earth, 43, 148-160. doi:10.1134/S106935130702005X
- Moskovskaya, L.F., Kopytenko, Yu.A. and Hayakawa, M. (2010) Magnetotelluric and seismic monitoring in a subduction zone of the Japan, Problems of geophysics. 43. SPb, St. Petersburg University, 108-125.
- Vallianatos, F. and Tzanis, A. (1999) A model for the generation of precursory electric and magnetic fields associated with the deformation rate of the earthquake focus. In: Hayakawa, M., Ed., Atmospheric and Ionospheric Electromagnetic Phenomena Associated with Earthquakes, TERRAPUB, Tokyo, 287-305.
- Teisseyre, R. and Nagahama, H. (1999) Dislocational models of electric field generation in a seismic source zone. In: Hayakawa, M., Ed., Atmospheric and Ionospheric Electromagnetic Phenomena Associated with Earthquakes, TERRAPUB, Tokyo, 271-285.
- Feng, R., Hao, J. and Zhou, J. (2002) Resistivity tomography: Observation and earthquakes monitoring. In: Hayakawa, M. and Molchanov, O.A., Eds., Seismo Electromagnetics: Lithosphere-Atmosphere-Ionosphere Coupling, TERRAPUB, Tokyo, 91-97.