Seismic structure of the 2015 M_w7.8 Gorkha earthquake revealed by ambient seismic noise and teleseismic surface wave tomography.

ABSTRACT: The destructive 2015 M_w7.8 Gorkha earthquake occurred in the Main Himalayan Thrust due to the collision of the Indian and Asian plates, which provides a unique opportunity to understand the deep dynamic processes and seismogenic mechanisms of strong earthquakes. We construct a regional-scale shear-wave velocity model of the crust and uppermost mantle using ambient seismic noise and teleseismic surface wave at periods of 5-100 s around the Gorkha earthquake region. The new shear-wave velocity model exhibits prominently lateral heterogeneities in the Gorkha earthquake areas. We observe a high-velocity (high-V) zone around the Gorkha main shock in the Main Himalayan Thrust, indicating the existence of a high-strength asperity that sustains the stress accumulating. The aftershocks a

SUBMITTER: Lu Z 

PROVIDER: S-EPMC10995148 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature