陆态网络GPS连续站观测到的中国及周边地区2011-2015年MW6.0以上地震同震位移研究  

Research on the Co-seismic Displacement of Earthquake above MW6.0 in China and Its Surrounding Areas from 2011-2015 Based on Continuous GPS Observations

作　　者：王作钰[1] 赵国强[2] 王宇凡 WANG Zuo-yu;ZHAO Guo-qiang;WANG Yu-fan(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063 [2]中国地震局地震预测研究所,北京100036

出　　处：《地震》2024年第4期183-193,共11页Earthquake

基　　金：国家重点研发计划项目(2023YFC3012005);中国地震局地震预测研究所基本科研业务费专项(CEAIEF20240201)。

摘　　要：利用GAMIT/GLOBK软件处理中国构造环境监测网络GPS连续站观测数据,获得GPS连续站观测到的2011—2015年共14次M_(W)6.0以上地震的同震水平位移场,结合震源区构造背景、震源机制解等,对同震位移场的空间分布特征进行分析研究。结果表明,震级越大、震源越浅、震中距越近,GPS连续站观测到的同震位移越显著。对于浅源地震,M_(W)6.0~6.5地震可观测到同震形变的范围在50 km以内,M_(W)6.5~7.0地震的同震形变在100 km以内,M_(W)7.0以上地震可观测到的同震形变则超过200 km。Using high precision data processing software GAMIT/GLOBK,we obtain co-seismic displacement of the 14 earthquakes above M_(W)6.0 from 2011 to 2015,based on the CMONOC GPS continuous stations.Combining the tectonic background and the focal mechanism,we research the spatial distribution characteristic of co-seismic displacement field.The results show that the larger magnitude,the shallower source,the closer epicentral distance,the more obvious the co-seismic displacement can be observed by GPS stations.For the shallow source earthquakes,the observable range of co-seismic deformation effects is within 50 km for the M_(W)6.0~6.5 earthquakes,within 100 km for the M_(W)6.5~7.0 earthquakes,and exceeds 200 km for the earthquakes with magnitudes above M_(W)7.0.

关 键 词：中国构造环境监测网络 GPS连续站 同震位移 

分 类 号：P315.7[天文地球—地震学]