Fig. 6: Centroid moment tensors and their centroid locations.

The red star is the M7.8 event epicenter, and the black star shows the M7.5 event epicenter. The red focal mechanisms are CMT reports by the USGS, GCMT, GFZ, and AFAD. The focal mechanisms colored by light to deep blue are the CMT inversion results based on the finite-fault source models with maximum rupture velocities of 2.0, 3.0, 4.0, 5.0, 6.0, and 7.0 km s-1, respectively. The blue focal mechanism is the CMT determined by the teleseismic observed waveforms. Circles indicate their related centroid locations. All of these centroid parameters are provided in Table 1. The map was generated by the GMT v.4.3.1 (https://www.generic-mapping-tools.org/).