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

Abstract

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

CLC Number:

P315.7

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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Relocation of Seismic Activity in Gaizhou Area Based on TomoDd Method

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