2008、2009年大柴旦6.3级、6.4级地震序列活动特征及前兆异常

Characteristics and anomaly of earthquake sequence activity of Da Qaidam Ms6. 3 and Ms6. 4 in 2008 and 2009

摘要:

利用区域地震构造和震源机制解等资料初步探讨了大柴旦强震发震构造。结合德令哈2003年6.6级、2004年2～5月5次5级的地震序列分布特征,初步探讨了大柴旦两次强震的地震序列时间、空间分布特征,同时分析了区域历史地震活动特点。初步分析了近10年来两次8级地震对该地区的影响,并结合青海地区的前兆观测资料分析和讨论了前兆异常及其特点。

Abstract:

The paper studies the seismogenic structure by the regional seismotectonics and focal mechanism and compares the strong earthquake sequence of time and space distribution characteristics of the Da Qaidam with the sequence distribution characteristics of the Delingha M6.6 earthquake in 2003, and the other 5 strong earthquakes of 2004 in Delingha. The regional characteristics of the historical seismic activity had been analyzed. This preliminary study shows the regional influence of the two earthquakes with M8.0 for last 10 years. The paper also discusses precursory anomaly and some of its characteristics on the basis of the region precursor observation data of the Qinghai Province.[著者文摘]