Major magnitude 7.1 earthquake - South Atlantic Ocean, South Georgia & South Sandwich Islands, on Sunday, Aug 22, 2021 at 7:33 pm (GMT -2) -

This quake was likely an aftershock of the 8.1 quake South Atlantic Ocean, South Georgia & South Sandwich Islands, Aug 12, 2021 4:35 pm (GMT -2), which had occurred 10 days earlier.
Major magnitude 7.1 earthquake - South Atlantic Ocean, South Georgia & South Sandwich Islands, on Sunday, Aug 22, 2021 at 7:33 pm (GMT -2) Major magnitude 7.1 earthquake - South Atlantic Ocean, South Georgia & South Sandwich Islands, on Sunday, Aug 22, 2021 at 7:33 pm (GMT -2)

Major magnitude 7.1 earthquake at 10 km depth

22 Aug 21:42 UTC: First to report: GFZ after 9 minutes.
22 Aug 21:43: Magnitude recalculated from 6.5 to 6.6. Hypocenter depth recalculated from 84.0 to 10.0 km (from 52 to 6.2 mi). Epicenter location corrected by 29 km (18 mi) towards NW.
... [show all] ...
23 Aug 08:20: Epicenter location corrected by 13 km (8 mi) towards WSW.

Earthquake details

Date & timeAug 22, 2021 21:33:20 UTC -
Local time at epicenterSunday, Aug 22, 2021 at 7:33 pm (GMT -2)
Depth10.0 km
Epicenter latitude / longitude60.4°S / 25.05°W (South Atlantic Ocean, South Georgia & South Sandwich Islands)
Antipode60.4°N / 154.95°E
Shaking intensitySevere shaking near epicenter
Felt1 report
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearest volcanoBristol Island (213 km / 132 mi)
Nearby towns and cities
Weather at epicenter at time of quakeOvercast Clouds -16°C (3 F), humidity: 92%, wind: 4 m/s (8 kts) from ESE
Estimated seismic energy released2.8 x 1015 joules (783 gigawatt hours, equivalent to 6.7 x 105 tons of TNT or 42.1 atomic bombs!) | about seismic energy
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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.
7.110 kmSouth Sandwich Islands RegionGFZ
7.030 kmSouth Sandwich Islands RegionGeoAu
7.114 kmSouth Sandwich Islands RegionUSGS
6.610 kmNear Mar Del PlataRENASS
6.97 kmSouth Georgia & the South Sandwich Is. [Sea]INGV
6.910 kmSouth Sandwich Islands RegionBMKG

User reports for this quake (4)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Americana, Brazil / not felt : Nothing | 2 users found this interesting.  
Mar del Plata, Partido de General Pueyrredón, Buenos Aires (3368.4 km WNW of epicenter) [Map] / not felt (reported through our app)
L'viv Lemberg Ukraine / Weak shaking (MMI III) : Schwindelig , kompliziertes Innehalten  
Graycourt, South Carolina / not felt
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