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Giappone · Duomo di lava

Nii-jima

Niijima

Tipo
Duomo di lava
Altitudine
432 m
Ultima eruzione
886
Nii-jima
Foto: っ at Japanese Wikipedia · CC BY-SA 3.0 · Wikimedia Commons
Tipo
Duomo di lava
Paese
Giappone
Regione
Pacifico nord-occidentale / Izu Volcanic Arc
Altitudine
432 m
Coordinate
34.397, 139.270
Ultima eruzione
886
Contesto tettonico
Zona di subduzione / Crosta oceanica (< 15 km)
Forma vulcanica
Minore (silicico)
Roccia principale
Riolite
Sintesi geologica

The elongated island of Niijima, SSW of Oshima, is 11 km long and only 2.5 km wide. Eight low rhyolitic lava domes are clustered in two groups at the northern and southern ends of the island, separated by an area of flat-topped domes and a low isthmus of pyroclastic deposits. The Mukaiyama complex on the south and the Atchiyama lava dome on the north were formed during eruptions in the 9th century CE, the last known activity. Shikineyama and Zinaito domes form small islands immediately to the SW and W, respectively, during earlier stages of volcanism. Earthquake swarms occurred during the 20th century.

Sintesi da Wikipedia

Riassunto in inglese

Nii-jima (新島) is a volcanic Japanese island administered by the Tokyo Metropolitan Government. It is one of the Izu Seven Islands, group of the seven northern islands of the Izu archipelago, and is located approximately 163 kilometres (101 mi) south of Tōkyō and 36 kilometres (22 mi) south of Shimoda Shizuoka Prefecture. The island is the larger inhabited component of the village of Niijima Village, Ōshima Subprefecture of Tokyo Metropolis, which also contains the neighboring island of Shikine-jima and the smaller, uninhabited Jinai-tō. Nii-jima is also within the boundaries of the Fuji-Hakone-Izu National Park.

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Storia delle eruzioni

5 registrateGlossario
Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni · Usa le frecce per spostarti tra le barre, Invio per aprire
5950 a.C.~5722 a.C. · 1 eruzioni · VEI max. ?4355 a.C.~4127 a.C. · 1 eruzioni · VEI max. ?1393 a.C.~1165 a.C. · 1 eruzioni · VEI max. ?658~886 · 2 eruzioni · VEI max. 45950 a.C.4355 a.C.2532 a.C.937 a.C.658

Cronologia dettagliata

  1. 886VEI 4Osservata
    886-06-29 – fine sconosciuta
    Mukai-yama
  2. 856VEI 2Osservata
    856 – 857
    Achi-yama
  3. 1250 a.C.VEI ?Stima geologica
    1250 a.C. – fine sconosciuta
  4. 4350 a.C.VEI ?Stima geologica
    4350 a.C. – fine sconosciuta
    Niijima-yama
  5. 5950 a.C.VEI ?Stima geologica
    5950 a.C. – fine sconosciuta

Vulcani nelle vicinanze

Link esterni

⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.