利用格林函数库计算2008年青海大柴旦6.4级地震的余震震源机制

Using Green Function Database and Quick Moment Tensor Inversion Calculating the Focal Mechanism Solution of Aftershocks of Dachaidan Ms6.4 Earthquake in 2008 in Qinghai Province

摘要:

通过建立格林函数库可以降低在矩张量反演过程中的计算量,提高获取中小地震震源机制解的速度。运用此方法对2008年11月10日青海大柴旦6.4级地震的地震序列中ML≥2.0的98个余震进行了震源机制解,在小震矩张量反演中克服了模拟资料无法准确得到小震震源机制解的缺陷,初步探索了运用区域数字地震台网资料确定中小地震震源机制解的方法,并对计算结果给出了解释。

Abstract:

Through establishing the Green function database, the calculation work in the moment tensors inversion method is reduced, and speed for getting focal mechanism solutions of moderate-small earthquakes is improved. Using this method the focal mechanism solutions for 98 events with MI≥2.0 in 2008, in Qinghai province are calculated. The result is discussed also. The research work is helpful to using regional digital seismograph network data for giving focal mecha nism solution of small earthquakes.