1947年西藏朗县东南M7.7大地震震源参数复核  

The redetermination of the source parameters of the big earthquake M 7.7 in the southeast of Lang county in Tibet in 1947

作　　者：李保昆[1] 刁桂苓[2] 邹立晔[1] 徐锡伟[3] 冯向东[2] 

机构地区：[1]中国地震台网中心,中国北京100045 [2]河北省地震局,中国石家庄050021 [3]中国地震局地质研究所,中国北京100029

出　　处：《地震地磁观测与研究》2014年第1期85-91,共7页Seismological and Geomagnetic Observation and Research

基　　金：国家自然科学基金项目(40821160550)资助

摘　　要：收集全球纪录的1947年7月29日,中国西藏朗县东南M 7.7大地震的观测数据,分别利用中国国家地震台网和国际地震中心ISC(International Seismological Center)的定位方法及技术重新测定。所定震中在里龙断裂带附近,经过比较分析,首选中国国家地震台网的定位方法测定结果。在此基础上,重新计算其震源机制解,和当地的里龙断裂走向一致,修订的震源位置也在该断裂上,表明里龙断裂可能是其发震断裂。A big earthquake with M7 .7 was occurred in the southeast of Lang county in Tibet on July 29,1947.We collect the global observational phase readings of this event,and we re-determined the source parameters with the daily location method and technical of the Chinese national network and the ISC locator respectively.Both the relocated epicenters are at the near of Lilong rupture,we prefer the location results of the Chinese national network after our comparison and analysis,and we recalculated the focal mechanism based on this new results.It is consistent with the strike of Lilong rupture,the revised location is also at the Lilong rupture,this indicate that the Lilong rupture was probably the seismogenic fault.

关 键 词：西藏朗县东南 1947年M 7.7地震 地震重定位 震源机制解 

分 类 号：P315.33[天文地球—地震学]