evidence of recent volconic eruptions
mikdbow (Premium member) > albums > Antarctica
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Approximately 10,000 years ago, a violently explosive eruption evacuated about 30 km³ of molten rock from Deception Island. The volcano summit collapsed to form the Port Foster caldera. The volcano was particularly active during the 18th and 19th centuries. 20th century eruptions occurred during two short periods, between 1906-1910 and 1967-1970. In 1992, enhanced seismic activity on Deception Island was accompanied by ground deformation and increased water temperatures. Today, the floor of Port Foster is rising rapidly in geological terms, and there are areas of long term geothermal activity. It is classified as a restless caldera with a significant volcanic risk.
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