Global Volcanism Program | Image GVP-11577
A NASA image shows Montagu Island's Mount Belinda in the South Sandwich Islands in eruption on September 23, 2005. A reddish dot (center) marks a thermal anomaly over the active summit vent. An ash plume rising above the summit cone casts a shadow on the glacier and is blown eastward by prevailing winds. The reddish area extending to the north coast of the island is a lava flow that produces steam clouds where it enters the sea. The eruption was first detected by satellite thermal alerts in October 2001. Sea ice partially surrounds the island.
ASTER satellite image courtesy of Hawaii Institute of Geophysics and Planetology (HIGP) Thermal Alerts Team, 2005.