The launch of a new GVP website is scheduled for Monday, May 20, 2013.
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Country: | Japan | |
| Subregion Name: | Honshu (Japan) | ||
| Volcano Number: | 0803-28= | ||
| Volcano Type: | Stratovolcanoes | ||
| Volcano Status: | Radiocarbon | ||
| Last Known Eruption: | 1550 ± 100 years | ||
| Summit Elevation: | 1585 m | 5,200 feet | |
| Latitude: | 40.656°N | 40°39'22"N | |
| Longitude: | 140.881°E | 140°52'51"E | |
| The basaltic-to-rhyolitic Hakkoda volcano includes 14 stratovolcanoes and lava domes south of Mutsu Bay at the northern end of Honshu. The NE rim of an 8-km-wide Pleistocene caldera forms an arcuate ridge across a flat caldera-floor moat NE of the Hakkoda group volcanoes, which bury the SE caldera wall. A northern group of volcanoes, constructed within the caldera, appears to be younger than the southern group. Hakkoda-Odake, Ido-dake, and Tsurugi-dake have well-preserved craters. Akakura-dake has a 1-km-wide explosion crater breached to the north. No historical eruptions are known of the Hakkoda group, although an active solfatara occurs at Ido-dake, and hot springs are found at several locations within the caldera. Three minor phreatic eruptions were documented from Jigoku-numa on the SW flank of Odake volcano from the 13th-17th centuries. Three soldiers on a training mission in July 1997 were killed by inhalation of volcanic gas. | |||
