本文へスキップ
地図に戻る
比較

硫黄島

Ioto

カルデラ · Japan · 169m

The discolored water seen here is from the September 2001 Ioto submarine eruption, with the vent marked by the yellow arrow. The island is located within a 9-km-wide submarine caldera and narrows toward its SW tip, where the Suribachiyama cone is located. Numerous phreatic eruptions and uplift over at least the past 700 years has accompanied resurgent doming of the caldera.
The discolored water seen here is from the September 2001 Ioto submarine eruption, with the vent marked by the yellow arrow. The island is located within a 9-km-wide submarine caldera and narrows toward its SW tip, where the Suribachiyama cone is located. Numerous phreatic eruptions and uplift over at least the past 700 years has accompanied resurgent doming of the caldera. · 写真: Photo by Nakahori, 2001 (Japan Meteorological Agency, published in the Bulletin of the Global Volcanism Network). · Wikimedia Commons
タイプ
カルデラ
Japan
地域
Northwestern Pacific Volcanic Regions / Ogasawara Volcanic Arc
標高
169m
座標
24.751, 141.289
最終噴火
2025年
テクトニクス環境
Subduction zone / Crustal thickness unknown
火山地形
Caldera
主要岩石
Trachyandesite / Basaltic Trachyandesite
地質学的概要

Ioto, in the Volcano Islands of Japan, lies within a 9-km-wide submarine caldera. The volcano is also known as Ogasawara-Iojima to distinguish it from several other "Sulfur Island" volcanoes in Japan. The triangular, low-elevation, 8-km-long island narrows toward its SW tip and has produced trachyandesitic and trachytic rocks that are more alkalic than those of other volcanoes in this arc. The island has undergone uplift for at least the past 700 years, accompanying resurgent doming of the caldera; a shoreline landed upon by Captain Cook's surveying crew in 1779 is now 40 m above sea level. The Motoyama plateau on the NE half of the island consists of submarine tuffs overlain by coral deposits and forms the island's high point. Many fumaroles are oriented along a NE-SW zone cutting through Motoyama. Numerous recorded phreatic eruptions, many from vents on the W and NW sides of the island, have accompanied the uplift.

Wikipedia の要約

要約が短いです。詳細は記事全文をご覧ください。

硫黄島 は、日本の小笠原諸島南部にある火山列島(硫黄列島)に属する島。南西端にある摺鉢山から北東へ8.3キロメートルの長さで扇形に広がっている。

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
850 BCE~658 BCE · 1件 · 最大 VEI ?1833~2025 · 32件 · 最大 VEI 1850 BCE83 BCE49212581833

詳細タイムライン

  1. 2025年VEI 1観測記録
    2025-09-01 ~ 2025-09-02
  2. 2023年VEI 1観測記録
    2023-10-18 ~ 2024-03-16
  3. 2022年VEI 1観測記録
    2022-07-11 ~ 2022-12-11
    Off SE coast
  4. 2021年VEI 1観測記録
    2021-08-12 ~ 2021-11-24
    Off SE coast
  5. 2020年VEI 1観測記録
    2020-12-28 ~ 2021-04-05
    Asodai Sinkhole
  6. 2018年VEI 1観測記録
    2018-09-08 ~ 2018-09-14
    Off the S coast
  7. 2016年VEI 1観測記録
    2016-08-31 ~ 2016-09-01
    Asodai Sinkhole
  8. 2015年VEI 1観測記録
    2015-08-07 ~ 2015-08-07
    Kianohana Beach (N part of the island)
  9. 2013年VEI 0観測記録
    2013-08-21 ~ 2013-08-30
    Off the NE coast
  10. 2012年VEI 1観測記録
    2012-02-10 ~ 2012-07-09
    Asodai
  11. 2012年VEI 1観測記録
    2012-12-01 ~ 2013-04-11
    Asodai
  12. 2010年VEI 1観測記録
    2010-06-19 ~ 2010-06-19
  13. 2004年VEI 1地質学的推定
    2004-06-06 ~ 2004-06-08
    Asodai area
  14. 2001年VEI 1観測記録
    2001-09-21 ~ 2001-10-23
    Off SE coast and Idogahama (NW coast)
  15. 1999年VEI 1観測記録
    1999-09-10 ~ 1999-09-10
    Asodai area
  16. 1994年VEI 1観測記録
    1994-08-22 ~ 1994-08-22
    NE side
  17. 1993年VEI 1地質学的推定
    1993-10-27 ~ 1993-11-16
    Asodai area and NE of Iwo-jima
  18. 1982年VEI 1観測記録
    1982-03-09 ~ 1982-03-10
    NW side (Idogahama beach)
  19. 1982年VEI 1観測記録
    1982-11-28 ~ 1982-12-16
    West side (Asodai)
  20. 1980年VEI 1観測記録
    1980-03-13 ~ 1980-03-13
    Kitanohara
  21. 1978年VEI 1観測記録
    1978-12-11 ~ 1978-12-11
    West side (Asodai)
  22. 1976年VEI 1観測記録
    1976-01-16 ~ 進行中
    West side (Asodai)
  23. 1974年VEI 0地質学的推定
    1974-01-16 ~ 1974-02-02
    NW of Iwo-jima (Kaiseinishinoba)
  24. 1969年VEI 1観測記録
    1969-01-12 ~ 1969-01-21
    West side (Asodai)
  25. 1969年VEI 1観測記録
    1969-12-01 ~ 1969-12-01
  26. 1967年VEI 1観測記録
    1967-12-23 ~ 1967-12-23
    West side (Asodai)
  27. 1957年VEI 1観測記録
    1957-03-28 ~ 1957-03-28
    Chidoriga-hara
  28. 1944年VEI 1観測記録
    1944-12 ~ 進行中
    North and west sides near the coast
  29. 1935年VEI 1観測記録
    1935 ~ 進行中
    SW side at Chidoriga-hara
  30. 1930年VEI 1観測記録
    1930 ~ 進行中
    NW side near the coast
  31. 1922年VEI 1観測記録
    1922-07 ~ 進行中
    West side (Asodai)
  32. 1889年VEI 1観測記録
    1889-12-31 ~ 進行中
    Chidoriga-ana
  33. 紀元前 850年 (±50年)VEI ?地質学的推定
    BCE 850 ~ 進行中
    Motoyama

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。