Antarctica experiences a massive earthquake swarm as an inactive volcano erupts

Antarctica detected a massive earthquake swarm, which according to experts, was due to the eruption of an inactive volcano named Orca. The earthquake affected the areas of Bransfield Strait, as stated by a research published in Communications Earth and Environment, a nature journal. The Brandfielf Strait is a water body with a width of 60 miles and is located between the South Shetland Islands and Antarctic Peninsula’s northwestern point.

The Orca volcano has an almost circular cone, and its basal part measures 7 miles. The height of the volcano is 2,950 feet.

Several scientists researched the ways to study and track the geographical, physical, and climatic effects that the Antarctic earthquake swarm might have caused. They also drew out data on the magnitudes of shocks. This data explained the possible reasons for the occurrence of a multitude. Among the many potential reasons, the major was the magma’s movement into the earth’s crust.


Research and studies about Antarctica’s possible volcanic eruptions are still going on. The lack of data regarding all these matters is major because of the remoteness of the area and the fact that it is all covered in ice.

What is an earthquake swarm?

An earthquake swarm translates to a series of shaky seismic incidents happening in a relatively smaller area continuously. It involves frequent mild shocks without the presence of a significant quake.

When did the swarm begin and end?

• The earthquake swarm started in August 2020. It comprised one-hundred and twenty-eight shocks, most of which were more than of 4.0-moment magnitude scale. The moment magnitude scales are more or less the same as the Richter scale’s readings.
• In the initial period, the recorded number of earthquakes was 3,186. The highest magnitudes were seen on two days- October 2 and November 6. On the former, the scale reading was measured to be 5.9, and on the latter, it was 6.0.
• The total number of earthquakes, including that of the initial phase, was 85,000. The swarm ended by late February 2021, and the seismic activities also halted soon after. As recorded by the researchers, these earthquake swarms are among the most intense natural geological activities of recent times.