近期天山地震带地震活动固体潮调制的统计分析  

Statistical Analysis on Tidal Triggering of Recent Earthquakes in the Tianshan Seismic Zone

作　　者：李金[1] 蒋海昆[2] 黄瑜 曲均浩[4] 高朝军[1] 

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011 [2]中国地震台网中心,北京100045 [3]新疆喀什基准台,新疆喀什844000 [4]山东省地震局,山东济南250014

出　　处：《地震》2014年第2期35-44,共10页Earthquake

基　　金：中国地震局2013年度震情跟踪合同制定向任务(2013020119);新疆地震局青年地震基金项目(201304)联合资助

摘　　要：利用Schuster检验方法,以潮汐体应力为计算量,采用2010年1月1日至2012年8月31日天山中东段ML≥2.0的地震数据,对天山地震带地震活动受固体潮触发情况从时、空两方面进行统计分析。研究结果显示,Schuster检验p值时间窗平滑结果与天山地震带较强地震的发生对应较好,尤其是2011年11月1日尼勒克6.0级地震之前很长一段时间,Schuster检验p值时间窗平滑结果一直低于潮汐触发地震的阈值0.05,而尼勒克6.0级地震发生后,该值迅速恢复到较高水平,反应了此次地震的发生与固体潮的密切关系;从Schuster检验p值空间窗平滑结果看,尼勒克6.0级地震也处于或接近潮汐调制触发地区。因而,从时、空两方面的检验结果看,尼勒克6.0级地震的发生受固体潮调制明显。A statistical analysis on earthquake activity in the Tianshan seismic belt trig- gered by tideswas spatio-temporally studied based on Schuster＇s test. The data was chosen from January 1, 2010 to August 31, 2012 with MI≥2.0 in the east of the Tianshan, forthe tidal body stress asthe calculation. The results showed that the p-value based on the time window smoothing of the Schuster＇ s test corresponded better with the strong earthquakes in the Tianshan seismic belt,especially that a long time before November 1, 2011 Nilka 6.0 earthquake, the p-value of the Schuster＇s test was always lower than the threshold for tidal trigger of earthquake 0.05, however,that value was quickly restored to a high level after the Nilka 6.0 earthquake, this reflected a close relationship between the Nilka 6.0 earthquake and the Earth tide. According to the p-value based on the spatial window smoothing of the Schuster＇s test, Nilka 6.0 earthquake was at or near the tidal triggering area. Judgingfrom the spatio temporal results, thet Nilka 6.0 earthquake was obviously triggered by Earth tides.

关 键 词：天山地震带 尼勒克地震 固体潮触发 Schuster检验 

分 类 号：P315.7[天文地球—地震学]