基于tomoDd方法对盖州地区地震活动的重新定位研究

doi:10.12196/j.issn.1000-3274.2022.02.012

地震 ›› 2022, Vol. 42 ›› Issue (2): 149-160.doi: 10.12196/j.issn.1000-3274.2022.02.012

基于tomoDd方法对盖州地区地震活动的重新定位研究

钱蕊, 王亮, 张博, 杨士超, 邵媛媛

辽宁省地震局, 辽宁沈阳 110034

收稿日期:2020-06-08 修回日期:2021-09-16 出版日期:2022-04-30 发布日期:2023-02-17
通讯作者: 王亮, 高级工程师。 E-mail: xie_god@163.com
作者简介:钱蕊(1990-), 女, 河北涉县人, 工程师, 主要从事数字地震学分析研究。
基金资助:
中国地震局地震预测研究所基本科研业务费专项(2018IEF0102); 中国地震局科技星火计划项目(XH21008Y); 辽宁省省科技厅项目(2017231013); 辽宁省地震局青年项目(2022039)

Relocation of Seismic Activity in Gaizhou Area Based on TomoDd Method

QIAN Rui, WANG Liang, ZHANG Bo, YANG Shi-chao, SHAO Yuan-yuan

Liaoning Earthquake Agency, Shenyang 110034, China

Received:2020-06-08 Revised:2021-09-16 Online:2022-04-30 Published:2023-02-17

摘要/Abstract

摘要： 2012年以来的盖州震群活动是辽宁省近年来最为显著的地震活动事件之一, 已有的研究结果显示, 盖州震群时间上呈阶段性活跃, 空间分为青石岭、西海域两个区域且均呈北西近东西向展布, 目前的相关研究针对2012年以来的震群进行了探讨与分析。但根据1970年以来该地区记录的地震目录显示, 该区域在20世纪八九十年代地震活动活跃, 因此, 本文应用tomoDd (Double-difference Seismic Tomography)方法对1980年以来的盖州地区的小震活动进行重新定位研究, 对比分析2012年以来的几丛震群活动与以往震群活动空间位置关系发现, 盖州地区在1982-1989年曾出现类似规模的地震活动, 且地震的空间集中度较高, 证明盖州及附近地区存在发生丛集性地震的构造背景。 2012年以来的震群活动可能属于该地区的又一次震群活动, 其活动的前兆指示意义有限。

关键词: 双差地震层析成像, 盖州震群, 重新定位

Abstract: The activity of the Gaizhou earthquake swarm since 2012 is one of the most significant seismicity events in Liaoning in recent years. According to the previous research results, the Gaizhou earthquake swarm is periodically active in time, and the space is divided into two areas: Qingshiling and Xihaiyu, all of which are distributed in the northwest to near east-west direction,but most of the research results only discuss and analyze the earthquake swarm since 2012.In this paper, the tomoDd method is used to relocate the activity of small earthquakes in Gaizhou area since 1980. Through comparative analysis of the spatial location relationship between these swarm activities since 2012 and the previous swarm activities, it is found that there have been similar scale earthquake activities in Gaizhou area from 1982 to 1989, and the spatial concentration of earthquakes is high, which proves that there is a tectonic background for cluster earthquakes in Gaizhou and nearby areas.The earthquake swarm activity since 2012 may belong to another earthquake swarm activity in this area, and its precursory indication significance is limited.

Key words: Double difference seismic imaging, Gaizhou earthquake swarm, Seismic relocation

中图分类号:

P315.7

钱蕊, 王亮, 张博, 杨士超, 邵媛媛. 基于tomoDd方法对盖州地区地震活动的重新定位研究[J]. 地震, 2022, 42(2): 149-160.

QIAN Rui, WANG Liang, ZHANG Bo, YANG Shi-chao, SHAO Yuan-yuan. Relocation of Seismic Activity in Gaizhou Area Based on TomoDd Method[J]. EARTHQUAKE, 2022, 42(2): 149-160.

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基于tomoDd方法对盖州地区地震活动的重新定位研究

Relocation of Seismic Activity in Gaizhou Area Based on TomoDd Method

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