Possible triggering of solar activity to big earthquakes (Ms ≥ 8) in faults with near west-east strike in China
Possible triggering of solar activity to big earthquakes (Ms ≥ 8) in faults with near west-east strike in China
复制标题
DOI：
10.1360/03yw0103
复制
发表时间：
2004-04-01
期刊：
影响因子：
--
通讯作者：
Ma, LH
中科院分区：
文献类型：
--
作者：
Han, YB;Guo, ZJ;Ma, LH
本文研究了太阳活动与中国和蒙古西部地区Ms ≥ 8级大地震的关系。发现东西走向断裂及其附近的大地震，其发生日期大多接近太阳黑子数的极大年，而非东西走向断裂的大地震，其发生日期则不接近太阳黑子数的极大年。我们认为，这可能是由于在太阳活动极大年出现了许多磁暴。磁暴引起地磁场异常，在断层中产生涡流，孕育近东西向地震。可能是由于涡流加热了断层中的岩石，降低了岩石的抗剪强度和静摩擦极限，从而使孕育的大地震更容易发生
This paper studies the relationship between solar activity and big earthquakes (Msgreater than or equal to8) 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