夏河5.7级地震前湟源地震台地下流体数据异常分析  

Anomaly Analysis of Underground Fluid Data in Huangyuan Station before Xiahe M5.7 Earthquake

作　　者：王永刚[1] 丁宁霞[1] 孙丽[1] WANG Yong-gang;DING Ning-xia;SUN Li(Xining Seismic Station of Qinghai Earthquake Agency, Xining, Qinghai 810008, China)

机构地区：[1]青海省地震局西宁地震台,青海西宁810008

出　　处：《山西地震》2021年第3期18-21,共4页Earthquake Research in Shanxi

基　　金：青海省地震局科研项目(2020A03)。

摘　　要：夏河5.7级地震前,湟源地震台地下流体数据存在明显的异常变化。通过与该台形变数据的对比,证实地下流体数据对孕震区和外围区介质变化的响应较灵敏。地下流体由于其可流动的特性,有可能比形变观测仪器能更早地感知到来自地下应力场的变化。研究结果可为地震观测分析提供基础资料。Before the Xiahe M5.7 earthquake,there were obvious abnormal changes in underground fluid data at Huangyuan seismic station.By comparing with deformation data of Huangyuan station,it is proved that underground fluid data are sensitive to medium changes in seismogenic and peripheral areas.Because of its flow characteristics,underground fluids may be able to sense changes in underground stress fields earlier than deformation observation instruments.The research results can provide basic data for seismic observation and analysis.

关 键 词：地下流体 异常特征 应力响应 湟源地震台 

分 类 号：P315.723[天文地球—地震学]