バヌアツ · 成層火山
Eastern Gemini Seamount
Gemini-Oscostar
- タイプ
- 成層火山
- 標高
- 33m (海底)
- 最終噴火
- 1996年
- タイプ
- 成層火山
- 国
- バヌアツ
- 地域
- 南西太平洋 / Vanuatu Volcanic Arc
- 標高
- 33m (海底)
- 座標
- -20.957, 170.130
- 最終噴火
- 1996年
- テクトニクス環境
- リフト帯 / 海洋地殻 (< 15 km)
- 火山地形
- 火山群
- 主要岩石
- 玄武岩 / ピクライト質玄武岩
地質学的概要
The submarine Gemini-Oscostar volcanic field lies near the southern end of the Vanuatu (or New Hebrides) Volcanic Arc, ~100 km S of Aneityum Island. Water discoloration and bursts of very dark water were observed from Oscostar seamount (also known as Eastern Gemini) from a passing ship on 18 February 1996. Overflights as late as 22 February noted periodic explosions that ejected black material to about 20 m above sea level. It consists of an elongated NNE-SSW-trending ridge of submarine volcanoes with satellitic cones. Several basaltic samples and one andesitic rock dredged in 1989 were described as glassy, vesicular, and extremely fresh.
Wikipedia の要約
英語版の要約The Eastern Gemini Seamount, also known as Oscostar, is a seamount in the southwestern Pacific Ocean, about halfway between Vanuatu's Tanna and Matthew Islands. The only recorded eruption from Eastern Gemini was observed by a passing ship on February 18, 1996 when bursts of very dark water were observed.
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噴火履歴
1件の記録用語集詳細タイムライン
- 1996年VEI 1観測記録1996-02-18 ~ 1996-02-22
近くの火山
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。