Fig. 2
From: Temporal changes in inflation sources during the 2015 unrest and eruption of Hakone volcano, Japan
Seismic activity and inflation of Hakone volcano from April 1995 to December 2017. The hypocenters were determined by HSRI. a Hypocentral distribution of Hakone volcano. b Spatiotemporal seismicity change. The vertical axis represents latitude. c Magnitude–time diagram and cumulative number of earthquakes. d Baseline length change between the Odawara and Susono-2 GEONET stations. The major volcanic earthquake swarm periods were observed in 2001, 2006, 2008–2009, 2013, and 2015. The elevated seismic activity in 2011 was triggered by the 2011 Tohoku Earthquake (M9.0)