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Mikura-jima

Mikurajima

Stratovulcano · Japan · 851 m

The southern flanks of Mikurajima volcano are seen in this aerial view from the SSW. Oyama, the summit of the island, lies in shadow on the left horizon. The small Ichinomori spire is on the center, while the flat-topped Shipunegamori lava dome is at the far right.
The southern flanks of Mikurajima volcano are seen in this aerial view from the SSW. Oyama, the summit of the island, lies in shadow on the left horizon. The small Ichinomori spire is on the center, while the flat-topped Shipunegamori lava dome is at the far right. · Foto: Copyrighted photo by Akira Takada (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
Northwestern Pacific Volcanic Regions / Izu Volcanic Arc
Altitudine
851 m
Coordinate
33.874, 139.602
Ultima eruzione
-4100
Contesto tettonico
Subduction zone / Oceanic crust (< 15 km)
Forma vulcanica
Composite
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

Mikurajima is a small steep-sided island located between the more well-known Miyakejima and Hachijojima volcanoes. Oyama forms the summit of the basaltic-to-andesitic island, which is surrounded by cliffs and dissected on the southern-to-eastern sides. The sparsely populated island consists of a large stratovolcano with lava domes on the SE side. Several small sea stacks are located immediately offshore. Growth of the stratovolcano took place until about 7,000 years ago, and the latest activity occurred about 6,000 years ago, when explosive eruptions and pyroclastic surges accompanied lava dome growth.

Sintesi da Wikipedia

Riassunto in inglese

Mikura-jima (御蔵島) is an inhabited volcanic Japanese island in the Pacific Ocean. The island is administered by Tōkyō Metropolis and is located approximately 200 kilometres (120 mi) south of Tokyo and 19 kilometres (12 mi) south-southeast of Miyakejima. It is one of the Izu Seven Islands group of the seven northern islands of the Izu archipelago. Mikurashima is administratively part of Mikurashima Village under Miyake Subprefecture of Tokyo Metropolis. As of 2009, the island's population was 351. Mikura-shima is also within the boundaries of the Fuji-Hakone-Izu National Park.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
5050 BCE~4955 BCE · 1 eruzioni · VEI max. ?4195 BCE~4100 BCE · 1 eruzioni · VEI max. ?5050 BCE4860 BCE4575 BCE4385 BCE4195 BCE

Cronologia dettagliata

  1. 4100 a.C. (±100 anni)VEI ?Stima geologica
    BCE 4100 – In corso
    Tsubunegamori & Yasukajigamori domes
  2. 5050 a.C.VEI ?Stima geologica
    BCE 5050 – In corso

Link esterni

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