Possible triggering of solar activity to big earthquakes (Ms?8) in faults with near west-east strike in China

This paper studies the relationship between solar activity and big earthquakes (Ms≥8) that occurred in China and western Mongolia. It is discovered that the occurrence dates of most of the big earthquakes in and near faults with west-east strike are close to the maximum years of sunspot numbers, whe...

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Veröffentlicht in:Science China. Physics, mechanics & astronomy mechanics & astronomy, 2004, Vol.47 (2), p.173-181
1. Verfasser: HAN, Yanben
Format: Artikel
Sprache:eng
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Zusammenfassung:This paper studies the relationship between solar activity and big earthquakes (Ms≥8) that occurred in China and western Mongolia. It is discovered that the occurrence dates of most of the big earthquakes in and near faults with west-east strike are close to the maximum years of sunspot numbers, whereas dates of some big earthquakes which are not in such faults are not close to the maximum years. We consider that it is possibly because of the appearance of many magnetic storms in the maximum years of solar activity. The magnetic storms result in anomalies of geomagnetic field and then produce eddy current in the faults gestating earthquake with near west-east strike. Perhaps the gestated big earthquakes occur easily since the eddy current heats the rocks in the faults and therefore decreases the shear resistant intensity and the static friction limit of the rocks.
ISSN:1672-1799
1674-7348
1869-1927
DOI:10.1360/03yw0103