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Global Volcanism Program | Image GVP-02060

The N flank of Chokaisan was the source of a large debris avalanche about 2,600 years ago that traveled 25 km into the Japan Sea and underlies much of the foreground area. Collapse of the summit left a 3 x 4 km open caldera with the eastern rim forming the left-center peak and the western rim to the right. Following the collapse, a series of lava domes and lava flows filled the upper part of the caldera and formed the center peak. Photo by Ichio Moriya (Kanazawa University).

The N flank of Chokaisan was the source of a large debris avalanche about 2,600 years ago that traveled 25 km into the Japan Sea and underlies much of the foreground area. Collapse of the summit left a 3 x 4 km open caldera with the eastern rim forming the left-center peak and the western rim to the right. Following the collapse, a series of lava domes and lava flows filled the upper part of the caldera and formed the center peak.

Photo by Ichio Moriya (Kanazawa University).

Keywords: lava dome


Chokaisan