Eastern Gemini Seamount
Gemini-Oscostar
Stratovulcano · Vanuatu · 33 m (sottomarino)
- Tipo
- Stratovulcano
- Paese
- Vanuatu
- Regione
- Southwestern Pacific Volcanic Regions / Vanuatu Volcanic Arc
- Altitudine
- 33 m (sottomarino)
- Coordinate
- -20.957, 170.130
- Ultima eruzione
- 1996
- Contesto tettonico
- Rift zone / Oceanic crust (< 15 km)
- Forma vulcanica
- Cluster
- Roccia principale
- Basalt / Picro-Basalt
Sintesi geologica
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.
Sintesi da Wikipedia
Riassunto in ingleseThe 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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Storia delle eruzioni
Cronologia dettagliata
- 1996VEI 1Osservata1996-02-18 – 1996-02-22
Link esterni
⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.