Scaling relations of moment magnitude, local magnitude,and duration magnitude for earthquakes originated in northeast India  

作　　者：Dipok K.Bora 

机构地区：[1]Department of Physics, Diphu Government College

出　　处：《Earthquake Science》2016年第3期153-164,共12页地震学报（英文版）

基　　金：partially supported by the University Grant Commission (UGC),New Delhi,India,vide sanctioned No.F.No.-43-522/2014(SR)

摘　　要：In this study, we aim to improve the scaling between the moment magnitude （Mw）, local magnitude （ME）, and the duration magnitude （MD） for 162 earthquakes in Shillong-Mikir plateau and its adjoining region of northeast India by extending the Mw estimates to lower magnitude earthquakes using spectral analysis of P-waves from vertical component seismograms. The Mw-ML and Mw-MD relationships are determined by linear regression analysis. It is found that, Mw values can be considered consistent with ME and My, within 0.1 and 0.2 magnitude units respectively, in 90 % of the cases. The scaling relationships investigated comply well with similar relationships in other regions in the world and in other seismogenic areas in the northeast India region.In this study, we aim to improve the scaling between the moment magnitude （Mw）, local magnitude （ME）, and the duration magnitude （MD） for 162 earthquakes in Shillong-Mikir plateau and its adjoining region of northeast India by extending the Mw estimates to lower magnitude earthquakes using spectral analysis of P-waves from vertical component seismograms. The Mw-ML and Mw-MD relationships are determined by linear regression analysis. It is found that, Mw values can be considered consistent with ME and My, within 0.1 and 0.2 magnitude units respectively, in 90 % of the cases. The scaling relationships investigated comply well with similar relationships in other regions in the world and in other seismogenic areas in the northeast India region.

关 键 词：Local magnitude Moment magnitude Duration magnitude Shillong-Mikir plateau 

分 类 号：P315[天文地球—地震学]