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Otake

Nakanoshima

Stratovulcano · Japan · 979 m

Nakanoshima island is seen here from a beach on Kuchinoshima to the NNE. The active cone of Ontake to the right has a summit crater that fills with water during the rainy season. The 9 x 5 km island is surrounded by coral reefs, and a flat plateau separates it from an older dissected volcano to the south. Minor activity has been reported in historical time.
Nakanoshima island is seen here from a beach on Kuchinoshima to the NNE. The active cone of Ontake to the right has a summit crater that fills with water during the rainy season. The 9 x 5 km island is surrounded by coral reefs, and a flat plateau separates it from an older dissected volcano to the south. Minor activity has been reported in historical time. · Foto: Copyrighted photo by Shun Nakano, 2005 (Japanese Quaternary Volcanoes database, RIODB, http://riodb02.ibase.aist.go.jp/strata/VOL_JP/EN/index.htm and Geol Surv Japan, AIST, http://www.gsj.jp/). · Wikimedia Commons
Tipo
Stratovulcano
Paese
Japan
Regione
Western Pacific Volcanic Regions / Ryukyu Volcanic Arc
Altitudine
979 m
Coordinate
29.859, 129.857
Ultima eruzione
1914
Contesto tettonico
Subduction zone / Oceanic crust (< 15 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

The 9 x 5 km island of Nakanoshima is surrounded by coral reefs. A flat plateau separates the older dissected Sakiwaridake volcano on the south from the active andesitic cone of Ontake, which forms the northern half of the island. Ontake contains a summit crater that is filled with water during the rainy season. Sulfur deposits were mined at a SE-flank solfatara until 1944. Only very minor activity has been reported in historical time. A small mud eruption took place in 1914 at the summit crater, and "smoking" increased in 1949.

Sintesi da Wikipedia

Riassunto in inglese

Otake is a stratovolcano in the Tokara Islands of Japan. It is the largest mountain on Nakanoshima, which is part of the village of Toshima in Kagoshima District of Kagoshima Prefecture. Being the largest mountain on a small island, it is also referred to as Nakanoshima. It is also called "Tokara Fuji" from its shape.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1914~1918 · 1 eruzioni · VEI max. 11946~1949 · 1 eruzioni · VEI max. 119141921193219391946

Cronologia dettagliata

  1. 1949VEI 1Stima geologica
    1949-10 – In corso
    On-take
  2. 1914VEI 1Osservata
    1914-01 – In corso
    On-take

Link esterni

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