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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: Lahar characteristics as a function of triggering mechanism at a seasonally snow-clad volcano: contrasting lahars following the 2014 phreatic eruption of Ontake Volcano, Japan

Fig. 3

Aerial photographs of the catchment of Akagawa and Shirakawa Rivers. a Google Earth image captured immediately after the eruption (on October 1, 2014) and b October 7, just 2 days after the rain-triggered lahar occurred on October 5 in the upstream and summit areas. Much of the slope-covered ashfall materials were swept away by the rainstorm. c Picture taken before the 2014 eruption (the area captured during August to November 2013 by the Geospatial Information Authority, Japan) of the confluence area of the Akagawa and Shirakawa Rivers (the same area in d and e). d Google Earth image captured on October 1. e Image (by Google Earth) showing the impact after the lahar (taken on October 7). Arrows indicate areas where major geomorphological changes (erosion and overbank deposition) by the lahar were identified

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