Height: 2568 meters
Area of Crater: 172787.6 meters2 (500ｍ×440m)
Circumference of Crater: About 1.5 kilometersThe Asama Mountain Ranae consists of 5 mountains:
1. Mount Asama： One of the most active volcanos in Japan. Recognized as one of the 100 famous mountains of Japan.
2.Kurofu Mountain:200,000 years ago the mountain side collapsed drastically changing the landscape of the mountain range.
3.Hotokeiwa Mountain: 200,000 years ago repeat eruptions flattened the mountain peak.
4.Mount Maekake: Formed about 10,000 years ago from an Asama eruption.
5.Kama Peak: Created on the summit of Maekake Mountain after an eruption of Asama Mountain in 1108.The Last MaJor Eruption of Mount Asama ：
In the summer 1783 (230 years ago) Mount Asama had a major eruption that lasted more than two months . The eruption is known as the deadliest in Japan’s recorded history.The total amount of deaths due to the eruption is estimated at 1400-1600 people. Also, throughout northern Japan, poor crops of previous years combined with the eruption is said to be the cause of one of the worst famines in Japanese history, resulting in many thousand more deaths.Coincidentally,celand’s Laki Volcano erupted that same summer, and spewed out toxic gases and f og which covered Europe, causing tens of thousands of deaths, massive famine across the continent, and creating
climatic instability throughout the entire northern hemisphere. This eruption is also proposed to be a factor in Japan’s famine.
13 kilometers from the volcano, the village of Kanbara was buried within minutes of an e×plosive eruption in August . Most of the villagers were saved, but over one hundred people were killed by the landslide. At the village hall only the top 15 stone steps were left after the rest of the 50 steps were buried in over 6 meters of mud.
Mudslide of the Agatsuma River:
A large mudslide caused by the eruption of Mount Asama flowed down the Agatsuma River, causing destruction and damage f or more than 100 kilometers downstream. Remains of the mudflow can be found as far away as Tokyo (over 180 kilometers). n the Kanashima, Gunma, over 70 kilometers from the mountain, the 11meters wide by 3 meters tall “Asama Rock”stands. In 1910, 127 years after the eruption, the bell of Jourinji Temple in Kanbara was found 15 kilometers downstream. The bell’s crown was found 12
kilometers downstream in 1983.
Onioshidashi Lava Flow:
The Onioshidashi Area is located north of Mount Asama. At the time of the eruption, flowing lava formed an unusual scene of various shapes and sized of volcanic rock. Onioshidashi refers to a place where volcanic monsters erupted from the underworld.
Sen Ton Iwa (1,000 Ton Rock):
In 1950, a small eruption of Mount Asama sent a large rock mass about 20 meters in diameter flying into the air, before it landed on the edge of the volcanic crater, where it can be seen sitting today.
Future Major Eruptions?
In recent times, Asama Mountain has been quiet. However, scientists predict that there is a strong possibility for major volcanic activity in the future. Because of this, the Japan Meterological Agency continues to closely monitor ↑he situation of the volcano. Recently, it was discovered that before an eruption small tremors can be detected in the interior of ↑he volcano.
Scientists believe that by monitoring these tremers, they can accurately forecast The severity and time of future eruptions.