2017年9月临城震群遗漏地震检测及发震构造初探

以河北测震台网记录的连续波形数据为基础,采用模板匹配滤波方法,检测2017年9月4日—6日河北临城震群遗漏地震。利用波形互相关扫描,检测到19次被测震台网常规分析遗漏的地震,震级范围为M_(L )0.0—1.2,并标定新检测地震事件的P波和S波到时,估计其震中位置及震级。通过地震精定位和最大地震震源机制解,认为此次临城地震序列的主要发震构造应为近EW向活动断层。

Missing earthquakes detection and preliminary study on seismogenic structure of the Lincheng earthquake swarm in September 2017

Based on the continuous wave data recorded by Hebei Digital Seismic Network, this paper uses the template matching filtering method to detect the missing earthquakes of the Lincheng earthquake swarm in Hebei from September 4th to 6th, 2017. Using the waveform cross-correlation technique, 19 missing earthquakes that were routinely analyzed by the seismic network were detected. The magnitude range was M_L 0.0-1.2, and the P-and S-wave arrivals of the newly detected seismic events were estimated, and the epicenter location and magnitude were estimated.Through relocation result and earthquake mechanism of maximum earthquake.We analyze that the main seismogenic structure of the Lincheng earthquake swarm may be the near EW active fault.