福建地区重复地震识别与应用

基于波形互相关原理,利用2008-2014年福建及临近地区的天然地震,识别出92组重复地震,主要分布于福建中部地区。其中3重以上41组,单组最大重数150重。基于重复地震识别的结果,在金钟水库库区开展了地壳介质变化检测。结果显示,金钟水库水位变化与P波走时差变化呈负相关,该特征在2013年期间尤为明显。

Based on the principle of waveform cross-correlation,92 groups of repeated earthquakes are identified by using the natural earthquakes in Fujian and its adjacent areas from 2008 to 2014,which are mainly distributed in the central part of Fujian.Among them,there were 41 groups with more than 3 weights,and the maximum weight in a single group was 150.Based on the results of repeated earthquake identification,crustal medium change detection is carried out in the reservoir area of Jinzhong Reservoir.The results show that the change of water level in Admiralty Reservoir is negatively correlated with the variation of P-wave travel time difference,which is especially obvious during 2013.