Fig. 7From: Descent of tremor source locations before the 2014 phreatic eruption of Ontake volcano, JapanHypocenters of volcano-tectonic earthquakes on September 27 determined by a the ASL method and b routinely determined by Tokyo VOIC. Error bar of each event was numerically estimated (see text) for (a) and ± standard error for (b)Back to article page