Fig. 3

Hypocenter distribution of aftershocks of the 2018 Hokkaido Eastern Iburi earthquake. a Epicenter distribution of aftershocks. A red star indicates the epicenter of the main shock. Thin solid lines are active faults (Research Group for Active Faults in Japan 1991). b Vertical cross section in East–West. A red star indicates the hypocenter of the main shock. c Vertical cross section in North–South. A red star indicates the hypocenter of the main shock