青海东北部地区地震直达波波速比及视速度测定与研究  

Determination and study of wave velocity ratio and apparent velocity in the northeast of Qinghai Province

作　　者：刘文邦[1] 

机构地区：[1]青海省地震局,中国西宁810001

出　　处：《地震地磁观测与研究》2016年第2期21-25,共5页Seismological and Geomagnetic Observation and Research

基　　金：青海省地震科学基金(2015A04)资助

摘　　要：利用青海数字地震台网观测报告,采用多台和达法,测定青海东北部地区2009年1月—2014年12月地震直达波波速比和视速度值,结果显示:1 5个子区域A1—A5平均波速比分布在1.686—1.705;平均P波视速度为5.979—6.022 km/s;平均S波视速度为3.535—3.579 km/s;2波速比和视速度的复杂变化特征,反映了研究区地壳介质及地质构造的复杂性及地震射线路径对结果的影响。Using the observation report of Qinghai Digital Seismic Network and multi-station method, the wave velocity ratio and apparent velocity of the earthquake in the northeast region of Qinghai Province during Jan., 2009 to Dec., 2014 are determined The study shows：①In the 5 subregions, the average velocity ratio values are in a range of 1.685—1.705. The average P wave apparent velocity values are in a range of 5.979—6.022 km/s; the average S wave apparent velocity values are in a range of 3.535—3.579 km/s.②The complex characteristics of velocity ratio and apparent velocity in the study area reflect the complexity of crustal medium and geological structure, but it may also relfect the inlfuence on the result of different seismic ray path.

关 键 词：波速比 视速度 青海东北部 

分 类 号：P315.31[天文地球—地震学]