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Fig. 4 | Earth, Planets and Space

Fig. 4

From: Volcanic unrest at Hakone volcano after the 2015 phreatic eruption: reactivation of a ruptured hydrothermal system?

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

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