Mount Michael is a mostly ice-covered stratovolcano. A crater (diameter: 2,300 feet, 700 m) and somma ridge are
located at the summit. An explosive eruption was reported at the central vent in 1819.
Vapor emissions were observed in 1820 and 1964.
Continued activity at Saunders Island lava lake. The existence of a recurrent active lava lake in the Mount Michael
summit crater on Saunders Island was first established from 1995-1998.
Likewise, the MODIS Thermal Alert system has detected repeated thermal anomalies throughout 2000-2002
in the summit area (Fig. 3), indicating that activity at the lava lake has continued to the present day.
More volcanoes discovered around South Sandwich Islands
ScienceDaily (July 11, 2011) Scientists from British Antarctic Survey (BAS) have discovered previously unknown volcanoes in the ocean waters around the remote South Sandwich Islands. Using ship-borne sea-floor mapping technology during research cruises onboard the RRS James Clark Ross,
the scientists found 12 volcanoes beneath the sea surface -- some up to 3km high. They found 5km diameter craters
left by collapsing volcanoes and 7 active volcanoes visible above the sea as a chain of islands.
Dr Phil Leat from British Antarctic Survey said, "There is
so much that we don't understand about volcanic activity
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