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West Mata

Frattura eruttiva · Tonga · 1174 m (sottomarino)

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. · Foto: Courtesy of NSF and NOAA Ocean Exploration Program, 2009. · Wikimedia Commons
Tipo
Frattura eruttiva
Paese
Tonga
Regione
Tonga-Kermadec Volcanic Regions / Northeast Lau Basin Volcano Group
Altitudine
1174 m (sottomarino)
Coordinate
-15.100, -173.750
Ultima eruzione
2009
Contesto tettonico
Subduction zone / Oceanic crust (< 15 km)
Forma vulcanica
Cluster
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

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.

Sintesi da Wikipedia

Riassunto in inglese

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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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
2008~2008 · 1 eruzioni · VEI max. 020082008200920092009

Cronologia dettagliata

  1. 2008VEI 0Osservata
    2008-11-16 – 2009-05-16
    Prometheus and Hades vents

Link esterni

⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.