新疆钻孔体应变资料提取地球自由振荡研究  

EXTRACTION OF EARTH FREE OSCILLATIONS FROM BOREHOLE VOLUME STRAIN DATA IN XINJIANG

作　　者：杨绍富[1] 张嘉敏[1] 邓明文 YANG Shao-fu;ZHANG Jia-min;DENG Ming-wen(Korla Seismic Station of Earthquake Agency of Xinjiang Uygur Autonomous Region,Korla 841000,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局库尔勒地震监测中心站,新疆库尔勒841000

出　　处：《内陆地震》2023年第2期145-151,共7页Inland Earthquake

摘　　要：基于功率谱方法,利用新疆铁门关台、温泉台、乌什台3套钻孔体应变资料提取2011年3月11日日本9.0级地震激发的地球自由振荡信息,将观测值频率与PREM模型理论值进行对比分析。结果表明,实测值与理论值基本一致,验证了PREM模型的准确性,显示出利用体应变资料提取地球自由振荡信息的可行性。3个台提取结果显示出一些共性和差异,与震源条件及钻孔所处地质构造有关。Using three sets of borehole volumetric strain data of Tiemengguan,Wenquan and Wushi stations in Xinjiang based on the power spectrum method,we extracts the information of Earth Free Oscillation excited by Japan M 9.0 earthquake on March 11,2011,compares the observed frequency with the theoretical value of PREM model.The results shows that the measured values are in good agreement with the theoretical values,and the accuracy of PREM model is verified.The results of three stations indicates some similarities and differences,which are related to the seismic source conditions and the geological structure of the borehole.

关 键 词：新疆 钻孔体应变 功率谱密度 地球自由振荡 PREM模型 

分 类 号：P315.7[天文地球—地震学]