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Nijima

Nishinoshima

Caldera · Japan · 100 m

A submarine explosion from Nishinoshima breaches the surface on 9 October 1973. Steam trails behind ejected hot blocks at the margin of the plume. Submarine eruptions began on 12 April 1973 and the new island was first observed on 11 September. Lava flows began in September and three new islands were formed, which joined together during October-November 1973.
A submarine explosion from Nishinoshima breaches the surface on 9 October 1973. Steam trails behind ejected hot blocks at the margin of the plume. Submarine eruptions began on 12 April 1973 and the new island was first observed on 11 September. Lava flows began in September and three new islands were formed, which joined together during October-November 1973. · Foto: Photo courtesy of Japan Meteorological Agency, 1973. · Wikimedia Commons
Tipo
Caldera
Paese
Japan
Regione
Northwestern Pacific Volcanic Regions / Ogasawara Volcanic Arc
Altitudine
100 m
Coordinate
27.247, 140.874
Ultima eruzione
2023
Contesto tettonico
Subduction zone / Crustal thickness unknown
Forma vulcanica
Caldera
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

The small island of Nishinoshima was enlarged when several new islands coalesced during an eruption in 1973-74. Multiple eruptions that began in 2013 completely covered the previous exposed surface and continued to enlarge the island. The island is the summit of a massive submarine volcano that has prominent peaks to the S, W, and NE. The summit of the southern cone rises to within 214 m of the ocean surface 9 km SSE.

Sintesi da Wikipedia

Nishinoshima è un'isola vulcanica disabitata dell'oceano Pacifico a circa 970 km a sud di Tokyo, nelle isole Ogasawara. In passato era anche conosciuta come Isola Rosario. L'isola si era ingrandita nel 1974, dopo che una piccola eruzione ne aveva creato una nuova sezione. Il 21 novembre 2013, invece, una nuova serie di eruzioni vulcaniche hanno ampliato ulteriormente l'isola, che è cresciuta di circa 20 volte da allora.

Wikipedia · CC BY-SA · Leggi l'articolo completo →

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1973~1978 · 2 eruzioni · VEI max. 21978~1983 · 3 eruzioni · VEI max. 01983~1988 · 3 eruzioni · VEI max. 01998~2002 · 1 eruzioni · VEI max. 02012~2017 · 2 eruzioni · VEI max. 22017~2022 · 4 eruzioni · VEI max. 219731983199820072017

Cronologia dettagliata

  1. 2022VEI 2Osservata
    2022-10-01 – 2023-10-13
    Central cone of 2013 island
  2. 2021VEI 2Osservata
    2021-08-14 – 2021-08-15
    Central cone of 2013 island
  3. 2019VEI 1Osservata
    2019-12-05 – 2020-08-27
    Central cone of 2013 island
  4. 2018VEI 1Osservata
    2018-07-12 – 2018-07-21
    Central cone of 2013 island
  5. 2017VEI 2Osservata
    2017-04-18 – 2017-08-17
    Central cone of 2013 island
  6. 2013VEI 2Osservata
    2013-11-20 – 2015-11-17
    Vent SSE of existing Nishinoshima
  7. 2001VEI 0Stima geologica
    2001-01-16 – In corso
  8. 1986VEI 0Stima geologica
    1986-07-02 – 1990-07-02
  9. 1985VEI 0Stima geologica
    1985-12-02 – 1985-12-02
  10. 1983VEI 0Stima geologica
    1983-07-02 – 1984-07-02
  11. 1982VEI 0Stima geologica
    1982-04-16 – 1982-04-16
  12. 1980VEI 0Stima geologica
    1980-07-07 – 1981-07-02
    South, east, and west sides
  13. 1978VEI 0Stima geologica
    1978-11-16 – 1979-07-02
    6.5 km NW of Nishino-shima
  14. 1975VEI 0Stima geologica
    1975-07-02 – 1977-07-02
  15. 1973VEI 2Osservata
    1973-04-12 – 1974-05-05
    Vent SE of existing Nishinoshima

Link esterni

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