摘要
在中强地震发生前的临界状态下,发震断层可能在大震面波应力扰动下出现微震活动增强的现象。利用β统计值方法和匹配滤波技术,对2014年11月22日康定M6.3地震震前大震在其主震及前震所在的鲜水河断裂带的动态触发作用进行了分析讨论。结果显示,未检测到由大震面波触发的微震,表明康定地震震前其主震及前震所在区域在大震面波的应力扰动下,未出现明显的微震触发现象;通过微震检测未发现断层积累应力水平较高、即将发生强震的证据。
In the critical state before the occurrence of moderate strong earthquakes, the micro-seismicity may increase in the seismogenic fault under the stress disturbance of the large earthquake surface waves. In this paper, we conduct a systematic search of remotely dynamic triggering around the Xianshuihe fault zone that the 2014/11/22 M 6.3 Kangding earthquake and its foreshock occurred in. From the statistical analysis and matched filter technique, we don’t find micro-earthquakes triggered by surface waves of the large earthquake. The results suggest that it doesn’t appear dynamic triggering phenomenon around the main shock and foreshock occurred area before the Kangding earthquake under the stress disturbance of the large earthquake surface waves. There is no evidence for strong earthquake will soon occurred in Kangding area according to micro-earthquake detection.
作者
马婷
谭毅培
丁晶
MA Ting;TAN Yipei;DING Jing(Tianjin Earthquake Agency,Key Laboratory of Earthquake Engineering Simulation and SeismicResilience, China Earthquake Administration,Tianjin 300201, China)
出处
《华北地震科学》
2019年第4期29-33,共5页
North China Earthquake Sciences
基金
国家自然科学基金项目(41604053)
地震科技星火计划项目(XH18006Y)
关键词
远场动态应力触发
匹配滤波
β统计值
康定地震
鲜水河断裂带
remotely dynamic triggering
matched filter technique
β statistical value
Kangding earthquake
Xianshuihe fault zone
