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- Mount Asama
Mount Asama is a complex volcano situated in the main island of Japan. The most active volcano in Honshu stands 2,568 metres above sea level. Built up from non-alkali mafic and pyroclastic volcanic rocks, it is one of the 100 popular Japanese mountains.
| Location: | Central Honshu, Japan |
| Coordinates: | 36.406450, 138.522344 |
| Volcano Type: | Complex volcano |
Mount Asama's location
Mount Asama's Eruptive History
| 1783 | May - Plinian eruption. One of Japan's largest eruptions in recorded history. This eruption built a new cone, rained pumice and caused massive pyroclastic flows. Activity ended post an enormous explosion that could be heard 300km away. 1400 people died as a direct result of the eruption, however a further 20,000 from famine |
| 1949-59 | Ongoing eruptive phase. Smoke observed rising from the crater on multiple occasions |
| 1961 | Eruption in Nov - eruption column observed |
| 1973 | A number of tremors were recorded before a powerful eruption occurred with lava bombs falling around the crater. |
| 1982-83 | Large explosion producing an ash plume to 5000m. A small pyroclastic flow was produced |
| 1995 | Series of earthquakes were recorded. No eruption occurred. |
| 2004 | After a long period of minor activity, a vulcanian eruption occurred creating a plume to 5000m. Ballistic blocks were ejected. |
| 2008 | Small series of eruptions producing minor ash plumes |
| 2009 | Following high gas levels, an eruption occurred with the accompanying plume reaching 2000m. Light ash fell on the city of Tokyo. |
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No monitoring of this volcano available.
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