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Eastern Gemini Seamount volcano

Submarine volcano -80 m / - 262 ft
France, Southwestern Pacific Ocean, -20.98°S / 170.28°E
Current status: dormant (1 out of 5)
Eastern Gemini Seamount volcano books
Typical eruption style: unspecified
Eastern Gemini Seamount volcano eruptions: 1996 No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

A submarine eruption, the first recorded in historical time from this previously little known seamount, was observed by a passing ship on February 18, 1996. Water discoloration and bursts of very dark water were observed at Eastern Gemini. Overflights as late as the 22nd noted periodic explosions that ejected black products to about 20 m above sea level. Located ~100 km south of Aneityum Island, about halfway between Yasur volcano and Matthew Island, the Eastern Gemini seamount, also known as Oscostar, is one of several seamounts along the southern submarine extension of the New Hebrides island arc. It consists of an elongated NNE-SSW-trending ridge of submarine volcanoes with satellitic cones. Several basaltic samples and one andesitic rock dredged from this seamount in 1989 were described as glassy, vesicular, and extremely fresh.
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Smithsonian / GVP volcano information


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