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West Mata

割れ目火口 · Tonga · 1174m (海底)

Incandescence and a plume at the Hades vent of West Mata in May 2009, a submarine volcano with a summit more than 1,000 m below the ocean surface. The volcano is located in the northeastern Lau Basin at the northern end of the Tonga arc, about 200 km SW of Samoa. It was discovered during a November 2008 NOAA Vents Program expedition, when West Mata was observed producing submarine hydrothermal plumes consistent with recent or ongoing lava effusion. A return visit in May 2009 documented explosive and effusive activity.
Incandescence and a plume at the Hades vent of West Mata in May 2009, a submarine volcano with a summit more than 1,000 m below the ocean surface. The volcano is located in the northeastern Lau Basin at the northern end of the Tonga arc, about 200 km SW of Samoa. It was discovered during a November 2008 NOAA Vents Program expedition, when West Mata was observed producing submarine hydrothermal plumes consistent with recent or ongoing lava effusion. A return visit in May 2009 documented explosive and effusive activity. · 写真: Courtesy of NSF and NOAA Ocean Exploration Program, 2009. · Wikimedia Commons
タイプ
割れ目火口
国
Tonga
地域
Tonga-Kermadec Volcanic Regions / Northeast Lau Basin Volcano Group
標高
1174m (海底)
座標
-15.100, -173.750
最終噴火
2009年
テクトニクス環境
Subduction zone / Oceanic crust (< 15 km)
火山地形
Cluster
主要岩石
Andesite / Basaltic Andesite
地質学的概要

West Mata, a submarine volcano rising to within 1,174 m of the ocean surface, is located in the northeastern Lau Basin at the northern end of the Tofua arc, about 200 km SW of Samoa and north of the Curacoa submarine volcano. Discovered during a November 2008 NOAA Vents Program expedition it was found to be producing submarine hydrothermal plumes consistent with recent lava effusion. A return visit in May 2009 documented explosive and effusive activity from two closely spaced vents, one at the summit, and the other on the SW rift zone.

Wikipedia の要約

英語版の要約

West Mata is an active submarine volcano located in the northeastern Lau Basin, roughly 200 km (124 mi) southwest of the Samoan Islands. It is part of the Tonga-Kermadec volcanic arc, which stretches from the North Island of New Zealand to Samoa. The volcano was first discovered in 2008 by scientists aboard the R/V Thompson research vessel, using sonar mapping and a remotely operated vehicle (ROV) to explore the seafloor. At the same time West Mata was discovered, multiple neighboring volcanoes—most of them hydrothermally active—were discovered as well, including Volcano O, Tafu-Maka, Northern Matas and East Mata.

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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
2008~2008 · 1件 · 最大 VEI 020082008200920092009

詳細タイムライン

  1. 2008年VEI 0観測記録
    2008-11-16 ~ 2009-05-16
    Prometheus and Hades vents

外部リンク

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