中国地震台网与美国地震台网测定震级的对比(Ⅱ)——面波震级  

COMPARISON BETWEEN EARTHQUAKE MAGNITUDES DETERMINED BY CHINA SEISMOGRAPH NETWORK AND U.S. SEISMOGRAPH NETWORK (Ⅱ): SURFACE WAVE MAGNITUDE

作　　者：刘瑞丰[1] 陈运泰[1] PETER BORMANN 任枭[1] 侯建民[1] 邹立晔[1] 杨辉[1] 

机构地区：[1]中国地震局地球物理研究所 [2]GEO FORSCHUNGS ZENTRUM,D-14478 POTSDAM,GERMANY

出　　处：《地震学报》2006年第1期1-7,共7页Acta Seismologica Sinica

基　　金：科技部"地震科学数据共享"项目资助;中国地震局地球物理研究所论著06AC1004.

摘　　要：采用正交回归方法，利用中国地震局地球物理研究所（IGCEA）和美国地质调查局国家地震信息中心（USGS／NEIC）1983-2004年的观测资料，对这两个机构测定的面波震级进行了系统的比较，得到了中国地震台网与美国地震台网面波震级之间的关系式．结果表明，由于使用的震级计算公式和观测仪器不同，IGCEA测定的面波震级总体上要比NEIC测定的结果偏高0．2级；对于3．5～4．5级的地震，IGCEA测定的震级比NEIC测定的震级偏高0．3级；对于5．0～6．5级的地震，IGCEA偏高0．2级；对于7．0级以上的地震，IGCEA偏高小于0．1级．By using orthogonal regression method, a systematic comparison is made between surface wave magnitudes determined by Institute of Geophysics of China Earthquake Administration （IGCEA） and National Earthquake Information Center of US Geological Survey （USGS/NEIC） on the basis of observation data collected by the two institutions between 1983 and 2004. A formula is obtained which reveals the relationship between surface wave magnitudes determined by China seismograph network and US seismograph network. The result shows that, as different calculation formulae and observational instruments are used, surface wave magnitude determined by IGCEA is generally greater by 0.2 than that determined by NEIC： for M=3. 5-4. 5 earthquakes, it is greater by 0.3; for M=5.0-6.5 earthquakes, it is greater by 0.2; and for M≥7.0 earthquakes, it is greater by no more than 0.1.

关 键 词：地方性地震震级 面波震级 体波震级 

分 类 号：P315.3[天文地球—地震学]