论文部分内容阅读
目前,国内外对于地震的时空异常图象研究广泛开展,作为异常图象之一的“空区”图式的探讨空前活跃。本文利用江苏、安徽等省区域地震台网资料,依据台网控制能力取震级下限2.0(M_L),对1974年4月22日和1979年7月9日江苏省溧阳县相继发生的5.8级和6.3级(M_L)地震之前区域微震活动的时-空图象进行研究,得到主震前以空区图象为主要特征的异常地震分布。具体方法是:围绕主震取一定范围,依主震发生时间为起点向前、往后推移,点震中分布图,寻找空区图象及正常图象。
At present, the researches on spatiotemporal anomaly images of earthquakes are widely carried out at home and abroad, and the discussion of the “space-zone” pattern as one of the anomalous images is unprecedentedly active. Based on the seismic network data of Jiangsu, Anhui and other provinces in China and the lower limit of magnitude of earthquake magnitude 2.0 (M_L) based on the control ability of Taiwan’s network, The time-space images of the microseismic activity in the area before the M (subscript M) 6.3 earthquakes are studied, and the anomalous earthquakes with the spatial image before the main shock are obtained. The specific method is: Take a certain range around the main shock, according to the time of the main shock as a starting point forward, backward, point in the distribution map, looking for empty images and normal images.