Way down south, on the island of Montagu, one of the South Sandwich
Islands, lies the
volcano Mount Oceanite. It's not so very tall, just 915 m asl, but still
not easy to climb,
as it is fully ice-covered. Its exact position is at 58:294 S and 26:154
The name refers to the oceanite lavas present in this area, which occur
in the South Sandwich Islands.
October 1st, 2004
steaming vent, and dark basaltic tephra covering ice surfaces N of the
lava that erupted
down the volcano's N flank. A steam plume drifted N, and light coloured
the S side of the crater.
Courtesy of the IKONOS satellite.
© Space Imaging.
7, 2003, by the Advanced Spaceborne Thermal Emission and Reflection
Radiometer (ASTER), a sensor onboard Terra.
Satellite imagery from 7 December 2003 showed that low-level
ash emission and lava effusion
had persisted steadily at Montagu Island (Mount Belinda) for the past
A NE-trending, 2-km-long lava flow was emplaced on the summit ice shelf
in July 2003,
and ash continued to blanket the eastern side of the island.
Background. The largest of the Sandwich Islands, Montagu consists of
one or more
stratovolcanoes with parasitic cones and or domes. The roughly rectangular-shaped
rises about 3,000 m from the sea floor and is roughly 10 x 12 km wide
with a prominent
peninsula at its SE tip. Around 90% of the island is ice-covered; glaciers
extend to the
sea over much of the island, forming vertical ice cliffs. Mount Belinda,
rising to 1,370 m,
is the high point of the island and lies at the southern end of a 6-km-wide
caldera. Mount Oceanite, an isolated 900-m-high peak, lies at the SE
tip of the island
and was the source of lava flows exposed at Mathias Point and Allen
There was no record of Holocene or historical eruptive activity at Montagu
satellite data, beginning in late 2001, revealed thermal anomalies consistent
with lava lake
activity that has been persistent since late 2001.
Thermal Alert Team, University of Hawaii Manoa
Montagu Information from the Global
Latest news always above. Below
is past history.
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