摘要
使用双差地震定位法对2008年10月6日西藏当雄6.6级地震序列重新定位,得到1 461个地震的定位结果。发现,重新定位后地震序列的分布更加集中,且明显呈NS向条带状分布,与该区域的活动构造走向基本一致,精确定位后的断层走向和震源机制解的走向也吻合。对该序列的b值随深度的变化情况进行分析统计,认为西藏该地区的地壳分层应分为4～5层较合适。
The sequence of Dangxiong M6.6 earthquake on Oct.6th,2008 has been relocated using double difference location method in this paper.The obtained location results of 1461 earthquakes indicate that the earthquake sequence distribution after relocation is more centralized,and presents obvious striped distribution in NS direction,which is basically consistent with the active tectonic strike in this region and focus mechanism solution.The analysis and statistics of b-value variation of the sequence with depth indicate that it is more reasonable to divide the crust of Tebit region into 45 layers.
出处
《山西地震》
2010年第2期8-11,共4页
Earthquake Research in Shanxi
关键词
西藏当雄6.6级地震
B值
双差定位
Dangxiong earthquake
Tibet
b-value
Double difference location
