South American SLR stations monitoring ground displacement caused by the M8.8 Chilean earthquake of 2010  

作　　者：YIN ZhiQiang HAN YanBen PODESTA Ricardo LIU WeiDong PACHECO Ana ALONSO Ester ACTIS Eloy HUANG DongPing ZHAO LiMin WANG Rui XIA JinChao 

机构地区：[1]National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China [2]Observatorio Astronomico Felix Aguilar, San Juan University, San Juan 5400, Argentina

出　　处：《Chinese Science Bulletin》2011年第8期738-742,共5页

基　　金：supported by the Foundation of International Science and Technology Cooperation (2009DFB00130);the External Cooperation Program of the Chinese Academy of Sciences (GJHZ200813);the Young Researcher Grant of NAOC

摘　　要：The M8.8 Chilean earthquake of February 27,2010 caused a large surface displacement near its epicenter.Satellite Laser Ranging(SLR) station 7405,cooperatively operated by Germany and Chile about 130 km from the epicenter was affected by the earthquake.Another SLR station,No.7406,operated jointly by the National Astronomical Observatories of the Chinese Academy of Sciences and San Juan University of Argentina,was about 600 km from the epicenter.Combining the observations of these two SLR stations with global SLR station observations,we calculate the geocentric coordinates of the two stations based on ITRF2000.The results show that the coordinates of the two stations have changed by varying degrees.SLR-7405 moved substantially towards the southwest with displacements of about 3.11,0.52 and 0.49 m in X,Y,Z directions;the corresponding displacements for SLR-7406 are about 0.02,0.03 and 0.02 m.This solution,as an independent result derived from SLR observations,could provide an essential external check for other positioning techniques such as GPS.The M8.8 Chilean earthquake of February 27, 2010 caused a large surface displacement near its epicenter. Satellite Laser Ranging （SLR） station 7405, cooperatively operated by Germany and Chile about 130 km from the epicenter was affected by the earth- quake. Another SLR station, No. 7406, operated jointly by the National Astronomical Observatories of the Chinese Academy of Sciences and San Juan University of Argentina, was about 600 km from the epicenter. Combining the observations of these two SLR stations with global SLR station observations, we calculate the geocentric coordinates of the two stations based on ITRF2000 The results show that the coordinates of the two stations have changed by varying degrees. SLR-7405 moved substantially towards the southwest with displacements of about 3.11, 0.52 and 0.49 m in X, Y, Z directions; the corresponding displacements for SLR-7406 are about 0.02, 0.03 and 0.02 m. This solution, as an independent result derived from SLR observations, could provide an essential external check for other positioning techniques such as GPS.

关 键 词：地表位移 8级地震 SLR 智利 ITRF2000 GPS定位技术 中国科学院 国家天文台 

分 类 号：P551[天文地球—构造地质学] P315.75[天文地球—地质学]