Tenmei eruption (1783) Mount Asama erupted in 1783 (Tenmei 3), causing widespread damage. The three-month-long plinian eruption that began on 9 May 1783, produced andesitic pumice falls, pyroclastic flows, lava flows, and enlarged the cone.

What type of eruptions does Asama produce?

Asama’s activity is typically explosive, including frequent strombolian to vulcanian activity. It has had several major eruptions, including 2 plinian eruptions in 1108 and 1783 AD.

How old is Mount Asama?

Asama is Honshu’s most active volcano, and has an historical record dating back more than 1300 years.

When was the last time Mount Asama erupted?

Asama is situated at the junction of two volcanic fronts in Japan and is therefore one of the more active of the ‘active volcanoes’. Although puffing smoke constantly, the last major eruption was on August 5, 1783, but 50 other ventings have been recorded. It now stands 8,338 feet high, but like Mt.

How often does Mt Asama erupt?

121 times
Asama has erupted 121 times. Most of these eruptions have been Vulcanian. A weak solfatara is active at the southwestern crater rim of the volcano. The last eruption of Asama was in 2003.

Is Mount Asama active in Japan?

Mount Asama (浅間山, Asama-yama, literally translated as ‘shallow mountain’) is an active complex volcano in central Honshū, the main island of Japan. The volcano is the most active on Honshū. The Japan Meteorological Agency classifies Mount Asama as rank A.

What type of rock is Mount Asama made of?

Mount Asama sits at the conjunction of the Izu-Bonin-Mariana Arc and the Northeastern Japan Arc. The mountain is built up from non-alkali mafic and pyroclastic volcanic rocks dating from the Late Pleistocene to the Holocene. The main rock type is andesite and dacite.

What happened when Mount Asamayama erupted?

In the late Heian Period (794–1185) the diary of the court noble Fujiwara no Munetada reported that Mount Asamayama erupted on 29 August 1108. He wrote that a local report described rice paddies and fields could not be farmed due to being covered by a thick layer of ash. Mount Asama erupted in 1783 ( Tenmei 3 ), causing widespread damage.

What is the size of the Kama-Yama crater?

Kama-yama is a cone at the center of the outer crater. It stands 8364 ft (2550 m) high. This cone rises 558 ft (170 m) above the bottom of the crater. Its crater pit is ~1150 ft (350 m) across and very active. The depth of this crater changes with time.