Fig. 7

Hypocentral distribution and frequency–magnitude distribution of the 2016 Kumamoto earthquake sequence for events shallower than 50 km (21:00 April 14–24:00 May 31, 2018; depth range 0–50 km). a Epicentral distribution (21:00 April 14 to 24:00 May 31, 2018). b Spatiotemporal distribution (21:00 April 14–24:00 April 17, 2018) projected onto line A–B in a. c Magnitude–time diagram (21:00 April 14–24:00 May 31, 2018). Red dots along the bottom indicate events whose magnitude undefined. Red, black, and gray dots indicate events in the JMA unified catalog (as of June 6, 2016), high-quality automatically processed hypocenters (time error within 0.2 s and horizontal error within 0.5′), and all automatically processed hypocenters, respectively. d Frequency–magnitude distribution of events related to the 2016 Kumamoto earthquake. Solid symbols indicate events in the JMA unified catalog, and open symbols indicate automatically processed hypocenters. Circles and triangles indicate cumulative and incremental frequencies, respectively