A 'swarm' of 85,000 in Antarctica that lasted about six months in 2020 was triggered by magma from an underwater volcano, a new study says. The swarm occurred at Orca Seamount, a deep-sea volcano near King George Island in Antarctica, in the Bransfield Strait, which has been inactive for 'a long time'. Researchers have used seismometers and remote sensing techniques to determine how long the swarm lasted, and what caused it.
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