Source rupture process of the 2018 Hokkaido Eastern Iburi earthquake deduced from strong-motion data considering seismic wave propagation in three-dimensional velocity structure

Earth, Planets and Space

Table 1 Summary of fault model setting in waveform inversion analysis

Origin time (JST)^a	2018/09/06 03:07:59.33
Hypocenter^a	42.6908°N, 142.0067°E, 37.04 km
Fault segment	South	Central	North
Strike/dip	10°/70°	355°/70°	5°/70°
Rake angle variation	90° ± 45°	90° ± 45°	90° ± 45°
Length	12 km	9 km	9 km
Width	24 km	24 km	24 km
Top depth	18.7 km	18.7 km	18.7 km
Bottom depth	41.3 km	41.3 km	41.3 km
Subfault size	3 km × 3 km
Number of subfaults	32	24	24
Number of time-windows	4
Duration/time-shift of time-window	2.0 s/1.0 s

^aThe origin time and hypocenter were taken from the JMA unified earthquake catalog