基于波形相似性的单台地震目录校正——以仙游地震序列为例

Waveform similarity-based single-station earthquake catalog correction:Take the Xianyou earthquake sequence as an example

本文基于波形相似性提出了一种适用于地震序列中单台事件目录校正的方法。以福建仙游地震序列为研究对象,应用双差地震定位(HypoDD)算法对多台事件进行重定位,依据记录波形相似性将仙游地震序列事件划分为161个事件丛集,以多台事件重定位目录为参考,对单台事件目录进行校正。结果表明,本方法能够有效地实现单台事件目录的合理校正,有助于提升地震序列目录的完整性和地震目录的实用性。以HypoDD重定位目录为参考的校正目录可用于地震参数计算。分析校正后的仙游地震序列目录认为,序列中的单台事件主要由金钟水库库区局部应力调整诱发。

Based on waveform similarity,we proposed a method that is suitable for single-station earthquake catalog correction for an earthquake sequence in this paper.Taking the Fujian Xianyou earthquake sequence as the research object,we first relocate all multi-station events by using the HypoDD algorithm,and then construct 161 clusters according to the waveform similarity calculation results,and we finally finish the single-station earthquake catalog correction by taking these relocated multi-station events as the template.The result shows that the singlestation earthquake catalogs were reasonably corrected by using our method,and the corrected single-station catalog may help improve the integrity of the whole seismic catalog and enhance the practicality of it.Referring to the relocated earthquake catalog,and we think the corrected single-station earthquake catalog can be used for statistical seismic parameter calculation.Using the corrected Xianyou earthquake sequence catalog,we analyzed that these single-station events are mainly induced by local stress adjustment around the Jinzhong reservoir area.