| CROSS ANALYSIS OF SATELLITE GEOMAGNETIC DATA AND GROUND MEASUREMENTS OF RADON CONCENTRATION TO DETERMINE EARTHQUAKE PRECURSORS (CASE STUDY FOR THE CALIFORNIA SEISMIC ACTIVE REGION) |
Kharitonov A.L.1, Kharitonova G.P.1, Truong Quang Hao2 1Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of RAS, Troitsk, e-mail: ahariton@izmiran.ru2Institute of Geophysics VAST, Hanoi The authors analyzed a recalculation results in the lower half-space of the magnetic field. The field was measured in ionosphere by MAGSAT satellite during the strong earthquakes within the California region in the Pacific seismic belt; the mean height comprised about 400 km. Besides, the authors analyzed the formation of large magnetic heterogeneities revealed on the satellite images. The heterogeneities are connected with the increased values of radon in atmosphere (0-400 km) above the epicenters of earthquakes. The satellite images reveal symmetric about equator large magnetic heterogeneities inside the Earth mantle developing from 90 minutes up to a few days prior to the main shock. We may consider them as short-term earthquake precursors. |
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