【摘要】 吉林省松原地区2013年10月31日开始发生了5次5级地震,地震活动呈震群态势。震群位于北东向的扶余—肇东断裂南端,台网定位结果显示震群活动集中于一点,没有明显的展布方向。由于该次震群中5级及以上地震较多,最大地震达到了5.8级,推测地震引起的断层破裂应有一定的距离。为深入探讨震群与断裂的关系以及震群展布方向等一系列问题,本文用双差定位的方法,利用2008年以来吉林、辽宁、黑龙江、内蒙古等地台网数据对吉林松原震群进行了重新定位研究。结果显示吉林松原5级震群呈北西近东西向分布,且地震活动在时间上有向东展布的态势。且震源深度变化较大。分析认为松原震群所处的地下断层较为复杂,可能发生在两条断裂相交的位置。更多还原

【Abstract】 There is ML5 earthquake swarm from Oct 31, 2013 in Songyuan area. Songyuan ML5 earthquake swarm was located on the Southern of the Fuyu-Zhaodong Fault. We used the earthquake observation reports recorded by Jilin,Liaoning,Heilongjiang seismic stations during the period from Oct 2013 to Jan 2014. Through double difference location method,we got the the earthquake location of Songyuan earthquake swarm..The result of earthquake location show the earthquake swarm speard along the EW-trending,indeed.Along with the earthquake swarm developing,the earthquakes occered to the east. Analysts believe Songyuan Earthquake swarm occurred in a new EW-trending faults.更多还原