河津4.8级地震前山西临汾台倾斜前驱波特征分析  

Analysis on Characteristics of Precursor Wave Recorded by Tiltmeter at Linfen Station in Shanxi before Hejin M4.8 Earthquake

作　　者：李艳[1,2] 高振强[2,3] 程冬焱[2,4] 张仰辉[1,2] 李军[1,2] 

机构地区：[1]山西省地震局临汾中心地震台,山西临汾041000 [2]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025 [3]山西省地震局夏县中心地震台,山西夏县044400 [4]山西省地震局,山西太原030021

出　　处：《地震研究》2013年第2期160-164,263,共5页Journal of Seismological Research

基　　金：2011年山西省地震局科研项目(SBK-1118);山西省自然科学基金(2011011027);山西省科技攻关项目(2006031106)联合资助

摘　　要：采用临汾台SSQ-2I型石英摆和VP型宽带垂直摆倾斜仪观测资料,运用原始形态曲线方法,对2010年1月24日山西河津4.8级地震前观测曲线进行分析。结果表明:在震前两种观测手段都记录到明显的前驱波,其形态特征与岩石力学中的粘滑事件非常相似,应是此次地震前显著的短临异常信息,同时给出了产生慢粘滑现象的机理解释。Using the observation data recorded by SSO-2I quartz horizontal pendulum and VP wild band vertical pendulum tiltmeter, we analyzed the observation curves before Hejin M4. 8 earthquake in Shanxi on Jan. 24, 2010 by the original shape curve method. The result showed that there were obvious precursor wave before Hejin M4. 8 earthquake on the observation curves recorded by two observational means. The morphological characteristics of precursor wave were similar with the stick-slip of the rock mechanics, which may was the short impending anomaly information of the Hejin M4.8 earthquake. We also gave the mechanism explanation of the slow stick slip.

关 键 词：河津4 8级地震 倾斜仪 前驱波 慢粘滑 短临异常 

分 类 号：P315.3[天文地球—地震学]