Gemini-Oscostar

sopka – Stratovolcano, Vanuatu, Southwestern Pacific Volcanic Regions

Kde

Vanuatu, Southwestern Pacific Volcanic Regions

Typ (GVP)

Stratovolcano

Nadmořská výška

-33 m

Tektonické prostředí

Rift zone / Oceanic crust (< 15 km)

Poslední známá erupce

1996

Poloha

-20,957°, 170,130°

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.

Text: Smithsonian Global Volcanism Program.

Údaje o sopce: Smithsonian Global Volcanism Program. Další sopky a průduchy.