黑龙江省重力监测数据变化与2018年吉林松原M_(S) 5.7地震的对应关系  

Correspondence between the variation of gravity monitoring data in Heilongjiang Province and the Songyuan M_(S) 5.7 earthquake in Jilin Province

作　　者：李俊秋 周晨 张雁翔 赵建通 张思萌 LI Junqiu;ZHOU Chen;ZHANG Yanxiang;ZHAO Jiantong;ZHANG Simeng(Heilongjiang Earthquake Agency,Harbin 150090,China)

机构地区：[1]黑龙江省地震局,哈尔滨150090

出　　处：《地震地磁观测与研究》2023年第3期122-127,共6页Seismological and Geomagnetic Observation and Research

摘　　要：2018年5月28日吉林省松原市宁江区发生M_(S) 5.7地震,黑龙江省牡丹江和漠河地震台重力仪均记录到此次地震事件,基于所记录面波的初动方向、同震响应延迟时间、最大震幅以及同震持续时间,分析2个监测站重力监测数据同震响应特征。结果表明,漠河地震台因震中距较远,同震响应延迟时间较长、最大震幅较小。以牡丹江地震台重力数据为例,采用Venedikov调和分析方法,对重力固体潮进行仪器零漂改正和气压改正,结果发现,该台重力固体潮非潮汐大幅变化可能与仪器灵敏度下降有一定关系,其相关性有待进一步研究。On May 28,2018,an earthquake with a magnitude of 5.7 occurred in Ningjiang District,Songyuan City,Jilin Province,which was recorded by the gravimeters at both Mudanjiang and Mohe Seismic Stations in Heilongjiang Province.This paper analyzed the co-seismic response characteristics of the gravity monitoring data at the two stations based on the first motion direction of the recorded surface waves,the delay time,maximum amplitude,and duration of the co-seismic response.The results show that the Mohe Seismic Station has a longer delay time in co-seismic response and a smaller maximum amplitude due to a longer distance from the epicenter.Taking the gravity data from Mudanjiang Seismic Station as an example,the Venedikov harmonic analysis method was used to correct the instrument zero drift and air pressure for the gravity solid tide,and it was found that the large non-tidal change in the gravity solid tide at the station is related to the air pressure change inside the instrument,and their correlation needs further study.

关 键 词：同震响应 重力观测结果 固体潮 非潮汐变化 

分 类 号：P315.726[天文地球—地震学]