Adatara volcan

stratovolcans 1718 m / 5,636 ft

Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 18 déc. 2012

Volcan Adatara est un groupe de stratovolcans qui se chevauchent est du volcan de Bandai et situé à 15 km SO de la ville de Fukushima. Son sommet le plus élevé est Minowa-yama stratovolcan, au nord de Tetsu-zan, qui est le volcan actif. Les formes de groupe une N-S réalisé chaîne allongée. Le volcan est connu pour ses sources thermales et les fumerolles. IO-gawa ("rivière soufre") quitte le complexe à l'Ouest. 72 travailleurs d'une mine de soufre dans le cratère du sommet ont été tués lors d'une éruption en 1900. Les éruptions historiques étaient tous de dans le cratère Numonotaira 1,2 km de large, à 350 m de profondeur de Tetsu-zan.

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Style éruptif tipique: explosive
Eruptions du volcan Adatara: 1996, 1900, 1899, 1813 (?)

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Introduction

The broad forested massif of Adatara volcano is mainly andesitic and consists of stratovolcanoes and lava domes built upon Tertiary sedimentary rocks on the south and rest on the flank of Azuma volcano on the north.
Adatara was constructed in 3 main stages that began about 550,000, 350,000, and 200,000 years ago. In the first stage, lava flows and pyroclastic flows formed the Maegatake cone. The second stage built the Osyozan cone. The 3rd stage erupted large amounts of lava flows, pyroclastic flows and andesitic lava domes and built the present-day chain of volcanoes.
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Source:
Yamamoto, T., & Sakaguchi, K. (2000). Eruptive history of Adatara volcano, NE Japan, during last 250,000 years based on tephrostratigraphy. Journal of Geological Society of Japan, 106(12), 865–882. GEOLOGICAL SOCIETY OF JAPAN.

1997 fatalities
On 15 September 1997 4 tourists were killed on Adatara volcano by inhaling lethal quantities of H2S gas, which had build up on the floor of Numano-taira crater.
The hikers were part of a group of 14 who visited Adatara volcano. 3 were killed initially and the 4th in his attempt to rescue the others. ...plus

See also: Sentinel hub | Landsat 8
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