Fig. 2

a Map view of curved fault model for the M 7.3 event, which is composed of three major parts (north, central, and south) with two transitional parts that smoothly connect the major parts. Black and red stars denote the hypocenter of the M 7.3 and M 6.5 events, respectively. Sky blue and gray circles denote the hypocenters of aftershocks (M ≥ 1), which were determined by the NIED Hi-net, 1 day and 1 month after the M 7.3 event, respectively. Pink circles denote the hypocenters of events (M ≥ 1) in the period between the M 6.5 event and the M 7.3 event, as determined by the NIED Hi-net. The broken line denotes an additional fault model for the M 7.3 event that has a 56 km × 24 km rectangular plane with a strike of 224° and a dip of 65°. b Curved fault model for the M 7.3 event with mosaicked SAR interferograms made by comparing two SAR images before and after the M 7.3 event (Ozawa et al. 2016). c Cross sections for the regions A, B, and C shown in Fig. 2b. Black thick lines denote the fault model for the M 7.3 event