Global Volcanism Program | Image GVP-01444
Midorigaike, seen here from the SW, is one of several craters along the summit complex of Hakusan. A documented eruption in 1042 CE formed Midorigaike pond and buried a wooden hut near the summit. Descriptions suggest that the eruption consisted of phreatic explosions that ejected older volcanic rocks around the vent.
Photo by Toshio Higashino (Haku-san Nature Conservation Center).