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Fig. 6 | Earth, Planets and Space

Fig. 6

From: Preparatory and precursory processes leading up to the 2014 phreatic eruption of Mount Ontake, Japan

Fig. 6

Seismicity detected by matched-filter processing. a Space–time diagram of all detected events before and after the 2014 phreatic eruption, from 23 August to 30 September. Blue circles and red stars denote VT earthquakes and LP events, respectively. The diagram shows earthquake origin times and locations projected onto the strike of the hypocenter alignments. b Depth variations in detected VT earthquakes over time. Circles are scaled to magnitude and color-coded to depth (below sea level (BSL), with positive values being below sea level). c Cumulative number of VT earthquakes (blue curve) and LP events (red curve) over time. d Magnitude versus time

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