3.Mainshock/largest Aftershock hypocenters
The mainshock and largest aftershock hypocenters were relocated by visually reading the Pg and Sg crustal phases travel times recorded in the IRSC network and inverting them using the HYPOCENTER code (Lienert and Havskov, 1995). We used a velocity model of the area by Tatar et al., (2012) and applied the station time corrections that were obtained in their study. The obtained hypocenter was situated 4 km North and 2 km East of the Mosha town, at a depth of 14 km (Fig. 4a; Table S1). It is 2 km to the North, 2 km to the East, and 3 km deeper than the IRSC hypocenter.
For the M4.1 aftershock, the obtained hypocenter was located 2 km south and 4 km West of the mainshock hypocenter and at a depth of 9 km (Fig. 4a). The latter is almost 1 km northwest of the IRSC reported hypocenter and is 3 km shallower than their result.
We stress that the hypocenter locations of the earthquakes in the study region provided by the BIN seismic network have higher uncertainty compared to IRSC reported locations. This is due to a relatively sparse coverage of the BIN network (only 3 stations in the distance of 100 km from the earthquake). While the IRSC network had 10 stations in the same distance from the source. The IIEES reported hypocenter for the mainshock is located at 2 km to the West, 3 km to the South, and 4 km shallower than our location. Their located hypocenter for the largest aftershock is situated in 2 km to the West, 3 km to the South, and 1 km deeper than our result.