2022年11月19日红河M_(S)5.0地震前云南地区异常特征  

Analysis of the anomaly characteristics in Yunnan region before the Honghe M_(S)5.0 earthquake in 2022

作　　者：杜家云 胡小静[2] 刘自凤 李琼[2] 毛慧玲[2] DU Jiayun;HU Xiaojing;LIU Zifeng;LI Qiong;MAO Huiling(Mile Earthquake Department in Honghe,Yunnan Province 652399,China;Yunnan Earthquake Agency,Kunming 650224,China)

机构地区：[1]红河州弥勒市地震局,中国云南652399 [2]云南省地震局,中国昆明650224

出　　处：《地震地磁观测与研究》2023年第5期1-9,共9页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局星火计划:滇南—滇西南地区地下流体异常深浅耦合关系研究(项目编号:XH21030Y)。

摘　　要：通过梳理2022年11月19日红河M_(S)5.0地震前云南地区地震活动和定点地球物理观测异常,发现:此次红河M_(S)5.0地震发生在2019年以来持续活动的滇东北至滇南—滇西南M_(L)≥4.0地震条带上,震前1年快速形成新的3级以上地震条带、峨山地震窗开窗、震群活动等地震活动异常,可以作为判定滇南—滇西南未来半年内5级以上地震发生的依据;震中附近地区200 km范围内的定点形变、流体观测异常显著,石屏倾斜和水位、思茅水温和气氡等测项异常出现时间晚于快速形成的3级地震条带,可作为判定发震紧迫程度的依据。This study summarized the seismic activity and geophysical observation anomalies in Yunnan before the Honghe M_(S)5.0 earthquake.The results showed thatthe Honghe M_(S)5.0 earthquake occurred on the M_(L)≥4.0 seismic belt from northeast to south to southwest in Yunnan,which had been active since 2019.A new M 3.0 seismic belt,the opening of the Eshan seismic window,and the earthquake cluster activity formed rapidly one year before the earthquake,which can be used as the basis for determining the occurrence of M_(S)5.0 earthquakes around south-southwest Yunnan in the next six months.The anomalies of deformation and fluid observation within 200 km of the epicenter were significant.The tiltmeter and water level observations at the Shiping Seismic Station and the water temperature and gas radon observations atthe Simao Seismic Station appeared later than the rapidly formed M 3.0 seismic belt,which can be used as the basis for determining the urgency of earthquakes.

关 键 词：红河M_(S)5.0地震 地震活动异常 地球物理观测异常 

分 类 号：P315.72[天文地球—地震学]