Magnitude Conversion Relations for Nepal Himalaya Region

Magnitude conversion is a critical step in the compilation of earthquake catalogues and the assessment of seismic hazard. Given Nepal's high seismic hazard and the limited availability of Nepal region-specific magnitude conversion relations, there is a need to develop empirical relationships that account for the unique tectonic and geological characteristics of the Nepal Himalaya region. This study used existing earthquake catalogues from various institutions to develop new magnitude conversion relations for Nepal Himalaya Region. In this study, we develop new empirical relations for conversion of other magnitudes to moment magnitude. We compare and validate the relations with existing global and regional relations available in the literatures. These relations are then used to compile homogenous earthquake catalogue for Nepal Himalaya region and to perform seismic hazard analysis.