2020年6月26日新疆于田MS6.4地震序列特征及震前地震活动异常分析  

CHARACTERISTICS OF SEISMIC ANOMALY AND SEQUENCE OF YUTIAN MS6.4 EARTHQUAKE ON JUNE 26TH,2020

作　　者：刘萍[1] 聂晓红[1] 高荣[1] LIU Ping;NIE Xiao-hong;GAO Rong(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2020年第3期239-248,共10页Inland Earthquake

基　　金：新疆地震科学基金(201803).

摘　　要：介绍2020年6月26日于田MS6.4地震基本参数、地震序列特征,对序列进行早期判定,并对震前出现的地震活动异常进行初步回顾总结。结果表明:于田MS6.4地震震源机制解类型为正断型;地震序列类型为前-主余型;余震序列衰减较为迅速。震前震源区及周围地区存在新疆境内M S5.0地震平静、小震调制比、新疆和田—西藏日土地区M S5.0地震平静异常。Introduces the basic parameters and sequence characteristics of Yutian MS6.4 earthquake on June 26th,2020,we makes early judgment on the sequence,and summarizes seismic anomalies before the earthquake.The results show that the focal mechanism solution type of Yutian MS6.4 earthquake is positive fault type;the type of earthquake sequence is pre-main residual type;the aftershock sequence attenuation is relatively rapid.Before the earthquake,there were M S5 seismic quiescence in Xinjiang area,small earthquake modulation ratio,and M S5 seismic quiescence anomalies in Hetian-Tibet region.

关 键 词：于田MS6.4地震 序列特征 地震活动特征 

分 类 号：P315.7[天文地球—地震学]