Quakes
Earthquake magnitude 5.5 (mww) in 58.103S 023.520W, depth 10 km at 292332Z aug 21
South Sandwich Islands Region · USGS-US7000F5IZ
- issued
- 2021-08-29 23:32Z
- status
- cancelled 2021-09-01 23:32Z
- self-cancels
- 2021-09-01 23:32Z
- authority
- USGS NEIC
- sea
- South Atlantic Ocean
- position
- -58.103, -23.520
- source
- usgs · first seen 2026-09-03 15:13Z
Original warning text
SOUTH SANDWICH ISLANDS REGION. 1. EARTHQUAKE MAGNITUDE 5.5 (MWW) IN 58.103S 023.520W, DEPTH 10 KM AT 292332Z AUG 21. 2. USGS EVENT US7000F5IZ. https://earthquake.usgs.gov/earthquakes/eventpage/us7000f5iz
This area · earthquake & tsunami bulletins
253 within 180 nm since 1997 · 9 in the last 12 months · 0 in force now
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- Earthquake magnitude 5.5 (mww) in 59.967S 018.990W, depth 15 km at 151451Z jul 262026-07-15
- Earthquake magnitude 5.7 (mww) in 57.911S 025.352W, depth 27 km at 161452Z feb 262026-02-16
- Earthquake magnitude 6.0 (mww) in 57.772S 025.599W, depth 64 km at 290730Z jan 262026-01-29
- Earthquake magnitude 5.6 (mww) in 58.664S 025.223W, depth 35 km at 171705Z dec 252025-12-17
- Earthquake magnitude 5.5 (mb) in 58.801S 025.488W, depth 30 km at 081841Z dec 252025-12-08
- Earthquake magnitude 5.6 (mww) in 57.963S 025.221W, depth 23 km at 052203Z nov 252025-11-05
Season · when earthquake & tsunami bulletins happen here
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month of issue, all years in the archive
Timeline · 5 messages since 2021-08-12 · closed 2021-09-01
- Earthquake magnitude 5.5 (mb) in 58.374S 024.323W, depth 10 km at 122350Z aug 212021-08-12 → 2021-08-15
- Earthquake magnitude 5.5 (mww) in 57.817S 023.987W, depth 10 km at 132004Z aug 212021-08-13 → 2021-08-16
- Earthquake magnitude 6.9 (mww) in 58.369S 023.355W, depth 17 km at 161110Z aug 212021-08-16 → 2021-08-19
- Earthquake magnitude 5.6 (mww) in 58.034S 023.898W, depth 10 km at 170310Z aug 212021-08-17 → 2021-08-20
- Earthquake magnitude 5.5 (mww) in 58.103S 023.520W, depth 10 km at 292332Z aug 21 this message2021-08-29 → 2021-09-01
joined by proximity
Nearby now · within 120 nm
Nothing else in force within 120 nm.
Worldwide now
5 earthquake & tsunami bulletins in force · see all
Quakes
Undersea earthquakes of magnitude 5.5 and above (USGS) and the tsunami bulletins NAVAREA coordinators relay. All current earthquake & tsunami bulletins →
Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.