Moderate mag. 4.8 earthquake - South Atlantic Ocean, Antarctica, on 20 Oct 11:00 pm (GMT -3) -

This quake was likely an aftershock of the 5.2 quake South Atlantic Ocean, Antarctica, 17 Oct 2020 9:05 pm (GMT -3), which had occurred 3 jours earlier.
Moderate mag. 4.8 earthquake - South Atlantic Ocean, Antarctica, on 20 Oct 11:00 pm (GMT -3)

Séisme modéré magnitude 4.8 at 10 km depth

21 Oct 02:10 UTC: Premier à signaler: GFZ après 10 minutes.
Date & time: 21 Oct 2020 02:00:30 UTC -
Local time at epicenter: 20 Oct 11:00 pm (GMT -3)
Magnitude: 4.8
Profondeur: 10.0 km
Epicenter latitude / longitude: 62.37°S / 58.28°W (South Atlantic Ocean, Antarctique)
Volcan le plus près: Penguin Island (35 km / 22 mi)
Weather at epicenter at time of quake:
Overcast Clouds -3°C (27 F), humidity: 73%, wind: 3 m/s (5 kts) from NW
Primary data source: GFZ (German Research Centre for Geosciences)
Estimated released energy: 1 x 1012 joules (278 megawatt hours, equivalent to 239 tons of TNT) More info
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
MagnitudeProfondeurLocationSource
M 4.810 kmSouth Shetland Islands, AntarcticaGFZ
M 5.110 kmSouth Shetland Islands, AntarcticaEMSC
M 5.18.6 kmSouth Shetland Islands, AntarcticaUSGS
M 5.013 kmTFAIAS (Argentina), AntarcticaINPRES

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Frei Antarctic Base (1.6 km WSW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 5-10 s : They were two, one immediately after the first one. So it was the longest since the end of August. In the beginning we always feel subterranean noise. Before and after were many light earthquakes. | 2 users found this interesting.
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