In August of 2020, an unusual geologic phenomena began in the northern Antarctic. Near the South Shetland Islands, an unusually energetic swarm of earthquakes began which were caused by the intrusion of a large body of magma. This body of magma totaled 0.41 cubic kilometers, and continued to get shallower in the crust, producing 85,000 earthquakes. It is now suspected that the eventual decline in earthquakes was caused by a large volume yet to be discovered volcanic eruption.
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Graphics of eruption dates are courtesy of the Global Volcanism Program, Smithsonian Institute. volcano.si.edu/
Google Earth imagery used in this video: ©Google
Thumbnail Photo Credit: NOAA & NSF, Public Domain
0:00 Antarctic Earthquake Swarm
0:34 A Magmatic Intrusion
1:13 Location of Orca Seamount
1:43 Geologic Setting
2:27 Earthquake Sequence
3:15 A Potential Submarine Eruption
Paper Referenced:
Cesca, S., Sugan, M., Rudzinski, Ł. et al. Massive earthquake swarm driven by magmatic intrusion at the Bransfield Strait, Antarctica. Commun Earth Environ 3, 89 (2022). doi.org/10.1038/s43247-022-00.... CC BY 4.0 License. Information in this paper such as estimated magma volume also falls under the CC BY 4.0 license.
Creative Commons License which the above paper used:
CC BY 4.0: creativecommons.org/licenses/...
7 авг 2024
