Fig. 4
Maps of hypocenters of volcano-tectonic earthquakes during the co-eruptive (2015) and post-eruptive (2017 and 2019) volcanic unrest episodes. Day 0 is set to the first day of a month during which onset of the edifice inflation was observed and shown in the bottom-right corner of each panel. Hypocenters of earthquakes that occurred within 180 days after day 0 are plotted. Colors indicate days after day 0 and the radius of each circle indicates magnitude of the earthquake. The total number of earthquakes during the 180 days are shown in the bottom-right corner of each panel. A in b) indicates the earthquake swarm in early May in 2017. B in c) indicates the swarms on 18 and 19 of May in 2019