本文へスキップ
← 地図に戻る
⇄ 比較

西之島

Nishinoshima

カルデラ · Japan · 100m

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. · 写真: Photo courtesy of Japan Meteorological Agency, 1973. · Wikimedia Commons
タイプ
カルデラ
国
Japan
地域
Northwestern Pacific Volcanic Regions / Ogasawara Volcanic Arc
標高
100m
座標
27.247, 140.874
最終噴火
2023年
テクトニクス環境
Subduction zone / Crustal thickness unknown
火山地形
Caldera
主要岩石
Andesite / Basaltic Andesite
地質学的概要

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.

Wikipedia の要約

英語版の要約

Nishinoshima is a volcanic island located around 940 km (584 mi) south-southeast of Tokyo that is part of the Volcano Islands arc. Nishinoshima is located about 130 km to the west of the nearest inhabited Ogasawara islands, Chichijima Island, hence the name; the other Ogasawara island groups are aligned more to the north–south. The nearest of the other Volcano Islands is over 270 km away, but Nishinoshima is on the alignment of the Volcano Islands.

Wikipedia · CC BY-SA · 記事全文を読む →

噴火履歴

概要 (VEI時系列)
バーをクリックすると個別の噴火が表示されます
1973~1978 · 2件 · 最大 VEI 21978~1983 · 3件 · 最大 VEI 01983~1988 · 3件 · 最大 VEI 01998~2002 · 1件 · 最大 VEI 02012~2017 · 2件 · 最大 VEI 22017~2022 · 4件 · 最大 VEI 219731983199820072017

詳細タイムライン

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

外部リンク

⚠ 参考情報です。緊急対応には使用しないでください。