尼泊尔8.1级地震后河北省数字形变观测同震响应研究  

Study on Coseismic Response of Digital Deformation Observation in Hebei after Nepal 8.1 Earthquake

作　　者：刘静[1] 尹宏伟[1] 李凤[1] 李瑞卿[1] 张蕾[1] 

机构地区：[1]河北省地震局石家庄中心地震台,河北石家庄050000

出　　处：《山西地震》2017年第3期17-21,共5页Earthquake Research in Shanxi

摘　　要：北京时间2015年4月25日14时11分26.3秒在尼泊尔境内发生Ms 8.1地震。通过分析河北省各形变台站的震时观测资料,研究各形变测项对尼泊尔地震的同震响应特征,结果表明,形变测项均记录到此次地震,同震响应形态分为振荡型、振荡-阶变型、阶变型三类;不同台站相同类型仪器的同震响应幅度有很大差别;同一台站同一仪器不同方向上记录波形幅度相差较大;地震对应变场的影响以EW向为主;记录到阶变型形变波的台站主要集中在河北省的北部,南部较少;认为尼泊尔地震后河北省北部地区的地震活动可能有增强的趋势,南部相对平静。Beijing time at 14：11 26.3 second on April 25,2015 Ms8.1 earthquake occurred in Nepal.Based on the analysis of seismic observation data during earthquake of each deformation station in Hebei Province,the characteristics of coseismic response are studied.The results show that all the items of deformation observation recorded this earthquake,and the coseismic response is divided into three types：oscillation,oscillation-order variable,order variable;The coseismic response amplitude of the same type of instruments at different stations is very different;The amplitude of the recorded waveform of the same instrument at the same station is different in different directions;The influence of the earthquake on the strain field is dominated by EW;The stations that recordedorder variable deformation wave are mainly in the northern part of Hebei province and less in the South;It is believed that the seismic activity in the northern part of Hebei province may be enhanced and the south is relatively quiet after the earthquake.

关 键 词：形变观测 同震响应 尼泊尔地震 

分 类 号：P315.725[天文地球—地震学]