Fig. 2

Oblique aerial photographs of the pyroclastic fall and pyroclastic density current deposits taken after the September 2014 eruption. a Area around the summit, photographed from the east at 09:49 am, September 28, 2014. b The hillside, photographed from the east at 09:48 am, September 28, 2014. The ash-fall deposit spread toward the northeast. c Jigokudani crater, photographed from the south at 09:56 am, September 28, 2014. The area covered by pyroclastic density current deposits is gray in color. The distal end of the pyroclastic density current travelled ~2 km outward from the crater (white arrow). d A new crater, photographed from the northeast at 09:59 am, September 28, 2014. The area covered by pyroclastic density current deposits is light gray in color. The distal end of the pyroclastic density current travelled ~1.5 km outward from the crater (white arrow)