Fig. 7
From: Source mechanism of a VLP event immediately before the 2014 eruption of Mt. Ontake, Japan
Comparison of our waveform inversion solution with other observations. Blue color represents the estimated VLP source crack; the upper edge and opening direction of the crack are plotted by the tick line and the arrows, respectively. Gray circles are hypocenters of VT earthquakes in August and September 2014 relocated by Kato et al. (2015). We did not use any magnitude threshold, and the magnitude ranged from −0.5 to +1.5. The triangle represents the summit of Mt. Ontake. Red and gray lines are the outlines of eruptive vents estimated by GSI (2014) and topographic contours (interval 50 m), respectively. Labels on the topographic contours represent elevations (m) above sea level