四川泸定6.8级地震定点形变异常特征  

Abnormal Characteristics of Fixed-Point Deformation of Luding M_(S)6.8 Earthquake in Sichuan

作　　者：周朝晖[1] 阳光[2] 宁冬梅 ZHOU Zhaohui;YANG Guang;NING Dongmei(Sichuan Earthquake Agency,29 Section 3 of South-Renmin Road,Chengdu 610041,China;Kangding Earthquake Monitor Center of Sichuan Earthquake Agency,47 Yinhe Road,Kangding 626001,China;Ya’an Emergency Management Bureau,66 Ningya Road,Ya’an 625000,China)

机构地区：[1]四川省地震局,成都市610041 [2]四川省地震局康定地震监测中心站,四川省康定市626001 [3]雅安市应急管理局,四川省雅安市625000

出　　处：《大地测量与地球动力学》2025年第4期362-366,共5页Journal of Geodesy and Geodynamics

基　　金：泸定地震灾后重建项目。

摘　　要：分析四川泸定6.8级地震前震中周边100 km内3个台站的垂直摆倾斜仪、水管仪、伸缩仪、钻孔应变仪和重力仪数据,发现震前部分仪器观测值超2倍均方差,且震中距的远近会影响异常持续时间的长短。This study analyzed data from vertical pendulum tiltmeters,water-tube tiltmeters,extensometers,borehole strainmeters,and gravimeters at three stations within 100 km of the epicenter prior to the M_(S)6.8 Luding earthquake in Sichuan province.The results revealed that pre-earthquake observations from some instruments exceeded two times the mean square deviation,and the distance from the epicenter influenced the duration of the anomalies.

关 键 词：泸定6.8级地震 定点形变 变化特征 重力观测 钻孔应变 

分 类 号：P315[天文地球—地震学]