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Moment Magnitude and Its Calculation

查看全文 作　　者：Chen [1]Yuntai;Liu [1]Ruifeng 高影响力作者 机构地区：[1]Institute of Geophysics,China Earthquake Administration,Beijing 100081,China高影响力机构 出　　处：《Earthquake Research in China》索引2018年第32卷第4期,共9页高影响力期刊 基　　金：the Monitoring Task of Department of Earthquake Monitoring and Prediction,China Earthquake Administration(2018);Technical Support and Effect Analysis of New Magnitude National Standard Implementation. 摘　　要：In this paper,we give a brief introduction to the proposal and development history of the earthquake magnitude concept. Moment magnitude MWis the best physical quantity for measuring earthquakes. Compared with other magnitude scales used traditionally,moment magnitude is not saturated for all earthquakes,regardless of big and small earthquakes,deep and shallow earthquakes,far field and near field seismic data,geodetic and geological data,moment magnitude can be measured,and can be connected with wellknown magnitude scales such as surface wave magnitude MS. Moment magnitude is a uniform magnitude scale,which is suitable for statistics with wide magnitude range.Moment magnitude is the preferred magnitude selected by the International Seismological community,and it is preferred by the departments responsible for publishing seismic information to the public. Moment magnitude is a uniform magnitude scale,which is suitable for statistics with wide magnitude range. Moment magnitude is a preferred magnitude for international seismology,it is preferred by the agency responsible for providing information about earthquakes to the public. We provide all formulas used in the calculation of moment magnitude,and the calculation steps in detail. We also analyzed some problems and rules to solve these problems by using different formulas and numerical value calculation steps. 关 键 词：EARTHQUAKE MAGNITUDE Local MAGNITUDE ML Surface WAVE MAGNITUDE MS Body WAVE MAGNITUDE MB MAGNITUDE SATURATION MOMENT MAGNITUDE MW Energy MAGNITUDE Me
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