Fig. 9From: Preparatory and precursory processes leading up to the 2014 phreatic eruption of Mount Ontake, JapanSchematic figure showing the preparation and precursory stages of the 2014 phreatic eruption of Mount Ontake. a Around the middle of September 2014 (1 to 2 weeks prior to the eruption). b Approximately 10 min before the eruption. Tilt change showing down in the ESE direction is consistent with opening of the shallow vertical conduitBack to article page