Lateral variations of the midcrustal seismicity in western Nepal: Seismotectonic implications

•First temporary seismological network in western Nepal.•Resolution of local hypocenters along the downdip end of the Main Himalayan Thrust.•Clustered seismicity develops at the intersection of Lesser Himalayan tectonic slivers.•Seismic swarms migrate at 50 m/day at the transition zone.•Earthquakes reveal the geometry of the fault leading to a new segmentation model.