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Ahyi

成層火山 · United States · 55m (海底)

Ahyi submarine volcano is seen in a bathymetric view looking from the NE with 2x vertical exaggeration. It rises to within about 150 m of the sea surface about 18 km SE of the island of Farallon de Pajaros (Uracas) in the northern Marianas. Water discoloration has been observed over the volcano and an explosive eruption was seismically detected in April 2001.
Ahyi submarine volcano is seen in a bathymetric view looking from the NE with 2x vertical exaggeration. It rises to within about 150 m of the sea surface about 18 km SE of the island of Farallon de Pajaros (Uracas) in the northern Marianas. Water discoloration has been observed over the volcano and an explosive eruption was seismically detected in April 2001. · 写真: Image courtesy of Susan Merle (Oregon State University/NOAA Vents Program).
タイプ
成層火山
国
United States
地域
Northwestern Pacific Volcanic Regions / Mariana Volcanic Arc
標高
55m (海底)
座標
20.437, 145.030
最終噴火
2026年
テクトニクス環境
Subduction zone / Crustal thickness unknown
火山地形
Composite
主要岩石
Andesite / Basaltic Andesite
地質学的概要

Ahyi seamount is a large conical submarine volcano ~18 km SE of the island of Farallon de Pajaros in the northern Marianas. Water discoloration has been observed there, and in 1979 the crew of a fishing boat felt shocks over the summit area, followed by upwelling of sulfur-bearing water. On 24-25 April 2001 an explosive eruption was detected seismically by a station on Rangiroa Atoll, Tuamotu Archipelago. The event was well constrained (+/- 15 km) at a location near the southern base of Ahyi. An eruption in April-May 2014 was detected by NOAA divers, hydroacoustic sensors, and seismic stations.

Wikipedia の要約

英語版の要約

Ahyi Seamount is an active shallow submarine volcano in the Northern Mariana Islands, in the Northwestern Pacific Ocean. It has erupted 5 times since the year 2000: in 2001, 2014, 2022–23, and twice in 2024. Since 2009, it has been a part of Marianas Trench Marine National Monument of the United States.

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
1934~1943 · 1件 · 最大 VEI 11961~1970 · 2件 · 最大 VEI 01970~1980 · 1件 · 最大 VEI 01980~1989 · 1件 · 最大 VEI 01989~1998 · 2件 · 最大 VEI 01998~2007 · 1件 · 最大 VEI 02007~2016 · 1件 · 最大 VEI 22016~2025 · 4件 · 最大 VEI 119341952198019982016

詳細タイムライン

  1. 2025年VEI ?観測記録
    2025-10-20 ~ 2026-01-09
  2. 2024年VEI 0観測記録
    2024-01-01 ~ 2024-03-27
  3. 2024年VEI 0観測記録
    2024-08-05 ~ 2025-05-28
  4. 2022年VEI 1観測記録
    2022-11-18 ~ 2023-06-11
  5. 2014年VEI 2観測記録
    2014-04-24 ~ 2014-05-17
    Summit crater and SE slope
  6. 2001年VEI 0観測記録
    2001-04-24 ~ 2001-04-25
    S of Ahyi (20.34 N, 145.02 E)
  7. 1994年VEI 0観測記録
    1994-04-23 ~ 進行中
  8. 1989年VEI 0観測記録
    1989-09-21 ~ 1989-12-27
    SW of Ahyi (~20.3 N, 144.9 E)
  9. 1985年VEI 0観測記録
    1985-08-02 ~ 1985-09-05
    SW of Ahyi
  10. 1979年VEI 0観測記録
    1979-11-15 ~ 1979-11-15
    Near the Ahyi summit
  11. 1969年VEI 0観測記録
    1969-03-11 ~ 1969-03-13
    S of Ahyi (20.24 N, 145.02 E)
  12. 1967年VEI 0観測記録
    1967-03-27 ~ 1967-04-10
    SW of Farallon de Pájaros
  13. 1934年VEI 1観測記録
    1934-07-15 ~ 進行中
    Vicinity of Farallon de Pájaros

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。