Fig. 4
From: Preparatory and precursory processes leading up to the 2014 phreatic eruption of Mount Ontake, Japan
Earthquake relocations. a Epicentral distribution of the relocated earthquakes superimposed on topography. Yellow and blue circles denote VT earthquakes before and after the 2014 eruption, respectively. Circles are scaled to magnitude. Yellow stars represent LP events prior to the eruption. White masked areas and a red triangle are eruptive craters identified by remote sensing (Geospatial Information Authority of Japan 2014) and the summit of Mount Ontake, respectively. b Vertical depth section of the relocated hypocenters perpendicular to the NNW–SSE orientation. The positive vertical axis is below sea level