利用加速度或速度记录快速测定矩震级的一种新方法  

A NEW METHOD OF FAST DETERMINING EARTHQUAKEMOMENT MAGNITUDE USING ACCELERATION OR VELOCITY RECORDINGS

作　　者：陈培善[1] 白彤霞[1] 成瑾[1] 

机构地区：[1]国家地震局地球物理研究所,北京100081

出　　处：《地球物理学报》1998年第S1期290-297,共8页Chinese Journal of Geophysics

摘　　要：根据峰值加速度、速度、位移对构造环境剪应力场和地震矩的依赖关系，导出了直接计算矩震级的公式．用北京怀来小台网（速度记录）、唐山强震观测台网（加速度记录）和北京地区台网（速度记录）的地震记录资料，检验了这些公式的可用性．结果表明，利用加速度或速度记录测定的矩震级与常规方法（根据位移谱高度）测定的矩震级十分接近．证明了这些公式的正确性，从而拓宽了用于测定震级的资料类型，即不仅限于位移记录，速度和加速度记录都可用于测定震级．According to the relations between the Peak ground acceleration, velocity and displacement and tectonic environment shear stress field and seismic moments, the formulas for calculating earthquake moment magnitude was obtained. The feasibility of these formulas was verified with velocity recordings by Huailai small digital seismic network, acceleration recordings by Tangshan strong groUnd motion network and velocity recordings by Beijing digital seismic network. Because the moment magnitudes determined from this method are very close to those determined from normal method, these formulas are available. Therefore,the recording types for determining earthquake moment magnitude were increased, that is to say, not only displacement recordings but also velocity and acceleration recordings can all be used to determine earthquake magnitude.

关 键 词：快速测定矩震级 加速度记录 速度记录 

分 类 号：P315.61[天文地球—地震学]