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

In this study, we aim to improve the scaling between the moment magnitude (M_W), local magnitude (M_L), and the duration magnitude (M_D) for 162 earthquakes in Shillong-Mikir plateau and its adjoining region of northeast India by extending the M_W estimates to lower magnitude earthquakes using spectral analysis of P-waves from vertical component seismograms.The M_W-M_L and M_W-M_D relationships are determined by linear regression analysis.It is found that, M_W values can be considered consistent with M_L and M_D, 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.