Earthquake & tsunami bulletins in the South Atlantic Ocean

Undersea earthquakes of magnitude 5.5 and above (USGS) and the tsunami bulletins NAVAREA coordinators relay.

in force
1
last 12 months
21
vs previous 12 (19)
+11%
since 1997
583

Coverage note: the NGA archive ends 2024-05 and live collection began 2026-08-17. Warnings issued in between are here only if they were still in force when collection started, so 2024–2026 are under-counted.

In force now · 1

  1. USGS-US7000TDRVin force2026-09-02
    An earthquake of magnitude 6.2 struck the South Sandwich Islands region at 02:23:46 UTC on September 26, at a depth of 126 kilometers.
    South Sandwich Islands Region

Longest in force

  1. USGS-US7000TDRVin force2026-09-02 · 1 d
    An earthquake of magnitude 6.2 struck the South Sandwich Islands region at 02:23:46 UTC on September 26, at a depth of 126 kilometers.
    South Sandwich Islands Region

By year

97
98
99
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

By month (all years)

J
F
M
A
M
J
J
A
S
O
N
D

Other hazards in the South Atlantic Ocean

Archive · 582 cancelled

  1. USGS-USP000B98A2002-08-03 → 2002-08-06
    Earthquake magnitude 5.7 (mwc) in 1.506S 014.374W, depth 10 km at 031418Z aug 02
    North of Ascension Island
  2. USGS-USP000B90T2002-07-30 → 2002-08-02
    Earthquake magnitude 6.2 (mwc) in 57.889S 023.242W, depth 33 km at 300655Z jul 02
    South Sandwich Islands Region
  3. USGS-USP000B8Z52002-07-29 → 2002-08-01
    Earthquake magnitude 5.6 (mwc) in 55.741S 026.871W, depth 33 km at 290726Z jul 02
    South Sandwich Islands Region
  4. USGS-USP000B6XC2002-06-25 → 2002-06-28
    Earthquake magnitude 5.6 (mwc) in 4.928S 012.384W, depth 10 km at 252147Z jun 02
    North of Ascension Island
  5. USGS-USP000B61S2002-06-12 → 2002-06-15
    Earthquake magnitude 5.6 (mwc) in 0.676S 020.722W, depth 10 km at 121952Z jun 02
    Central Mid-atlantic Ridge
  6. USGS-USP000AZZZ2002-03-09 → 2002-03-12
    Earthquake magnitude 6.0 (mwc) in 56.019S 027.332W, depth 118 km at 091227Z mar 02
    South Sandwich Islands Region
  7. USGS-USP000AZVC2002-03-07 → 2002-03-10
    Earthquake magnitude 5.6 (mwc) in 1.319S 024.481W, depth 10 km at 070710Z mar 02
    Central Mid-atlantic Ridge
  8. USGS-USP000AZEG2002-03-02 → 2002-03-05
    Earthquake magnitude 5.9 (mwc) in 35.717S 017.620W, depth 10 km at 020314Z mar 02
    Southern Mid-atlantic Ridge
  9. USGS-USP000AYS52002-02-19 → 2002-02-22
    Earthquake magnitude 5.7 (mwc) in 56.741S 025.436W, depth 33 km at 191233Z feb 02
    South Sandwich Islands Region
  10. USGS-USP000AY412002-02-10 → 2002-02-13
    Earthquake magnitude 5.9 (mwc) in 55.912S 029.004W, depth 193 km at 100147Z feb 02
    South Sandwich Islands Region
  11. USGS-USP000AUYA2001-12-20 → 2001-12-23
    Earthquake magnitude 5.5 (mwc) in 56.895S 025.024W, depth 33 km at 201201Z dec 01
    South Sandwich Islands Region
  12. USGS-USP000AU1E2001-12-05 → 2001-12-08
    Earthquake magnitude 5.7 (mwc) in 52.606S 018.349E, depth 10 km at 050746Z dec 01
    Southwest of Africa
  13. USGS-USP000ASX52001-11-15 → 2001-11-18
    Earthquake magnitude 6.3 (mwc) in 1.587S 015.578W, depth 10 km at 150103Z nov 01
    North of Ascension Island
  14. USGS-USP000AQ2C2001-10-01 → 2001-10-04
    Earthquake magnitude 5.6 (mwc) in 58.306S 025.438W, depth 33 km at 010418Z oct 01
    South Sandwich Islands Region
  15. USGS-USP000AJDQ2001-07-12 → 2001-07-15
    126 km ene of georgetown, saint helena
  16. USGS-USP000AD5V2001-04-13 → 2001-04-16
    Earthquake magnitude 6.2 (mwc) in 59.723S 025.586W, depth 26 km at 131533Z apr 01
    South Sandwich Islands Region
  17. USGS-USP000AC8R2001-03-30 → 2001-04-02
    Earthquake magnitude 5.5 (mwc) in 59.574S 026.263W, depth 33 km at 301811Z mar 01
    South Sandwich Islands Region
  18. USGS-USP000AB2Q2001-03-07 → 2001-03-10
    206 km ne of georgetown, saint helena
  19. USGS-USP000A89R2001-01-24 → 2001-01-27
    Earthquake magnitude 5.7 (mwc) in 0.596S 019.863W, depth 10 km at 240534Z jan 01
    Central Mid-atlantic Ridge
  20. USGS-USP000A7ZR2001-01-19 → 2001-01-22
    Earthquake magnitude 6.0 (mwc) in 58.161S 009.472W, depth 33 km at 190904Z jan 01
    East of the South Sandwich Islands
  21. USGS-USP000A75S2001-01-05 → 2001-01-08
    Earthquake magnitude 5.5 (mwc) in 0.657S 022.074W, depth 10 km at 051154Z jan 01
    Central Mid-atlantic Ridge
  22. USGS-USP000A6442000-12-15 → 2000-12-18
    Earthquake magnitude 5.5 (mwc) in 50.400S 006.883W, depth 10 km at 151300Z dec 00
    Southern Mid-atlantic Ridge
  23. USGS-USP000A5WV2000-12-11 → 2000-12-14
    Earthquake magnitude 5.7 (mb) in 55.910S 028.060W, depth 114 km at 111707Z dec 00
    South Sandwich Islands Region
  24. USGS-USP000A3F82000-11-12 → 2000-11-15
    Earthquake magnitude 5.5 (mwc) in 55.359S 029.896W, depth 33 km at 120329Z nov 00
    South Sandwich Islands Region
  25. USGS-USP000A35E2000-11-07 → 2000-11-10
    Earthquake magnitude 5.5 (mwc) in 55.136S 029.617W, depth 33 km at 071631Z nov 00
    South Sandwich Islands Region
  26. USGS-USP000A3452000-11-07 → 2000-11-10
    Earthquake magnitude 6.8 (mwb) in 55.627S 029.876W, depth 10 km at 070018Z nov 00
    South Sandwich Islands Region
  27. USGS-USP000A2GD2000-10-27 → 2000-10-30
    Earthquake magnitude 5.8 (mwc) in 1.595S 024.576W, depth 10 km at 270910Z oct 00
    Central Mid-atlantic Ridge
  28. USGS-USP000A27F2000-10-22 → 2000-10-25
    Earthquake magnitude 5.5 (mwc) in 57.241S 025.423W, depth 33 km at 221137Z oct 00
    South Sandwich Islands Region
  29. USGS-USP000A25W2000-10-21 → 2000-10-24
    Earthquake magnitude 6.0 (mwc) in 47.347S 012.403W, depth 10 km at 211135Z oct 00
    Southern Mid-atlantic Ridge
  30. USGS-USP000A01D2000-09-10 → 2000-09-13
    Earthquake magnitude 5.5 (mwc) in 1.924S 012.961W, depth 10 km at 102137Z sep 00
    North of Ascension Island
  31. USGS-USP0009Z3C2000-08-24 → 2000-08-27
    Earthquake magnitude 5.5 (mwc) in 28.010S 013.230W, depth 10 km at 241117Z aug 00
    Southern Mid-atlantic Ridge
  32. USGS-USP0009YVJ2000-08-21 → 2000-08-24
    Earthquake magnitude 6.1 (mwc) in 53.020S 045.966W, depth 10 km at 210916Z aug 00
    South Atlantic Ocean
  33. USGS-USP0009X4H2000-07-25 → 2000-07-28
    Earthquake magnitude 5.9 (mwc) in 53.553S 003.169W, depth 10 km at 250314Z jul 00
    Southern Mid-atlantic Ridge
  34. USGS-USP0009WJ92000-07-15 → 2000-07-18
    Earthquake magnitude 5.7 (mwc) in 54.104S 007.939E, depth 10 km at 150358Z jul 00
    Bouvet Island Region
  35. USGS-USP0009WJ62000-07-15 → 2000-07-18
    Earthquake magnitude 5.6 (mwc) in 0.440S 019.595W, depth 10 km at 150313Z jul 00
    Central Mid-atlantic Ridge
  36. USGS-USP0009RF52000-04-18 → 2000-04-21
    Earthquake magnitude 5.8 (mwc) in 52.455S 013.544E, depth 10 km at 180012Z apr 00
    Southwest of Africa
  37. USGS-USP0009MEQ2000-01-21 → 2000-01-24
    Earthquake magnitude 5.8 (mwc) in 59.287S 017.224W, depth 10 km at 210504Z jan 00
    East of the South Sandwich Islands
  38. USGS-USP0009KVK2000-01-07 → 2000-01-10
    Earthquake magnitude 5.5 (mwc) in 54.326S 055.126W, depth 10 km at 072337Z jan 00
    Falkland Islands Region
  39. USGS-USP0009KSW2000-01-05 → 2000-01-08
    Earthquake magnitude 5.6 (mwc) in 56.103S 058.442W, depth 10 km at 051755Z jan 00
    Scotia Sea
  40. USGS-USP0009K591999-12-22 → 1999-12-25
    Earthquake magnitude 5.7 (mwc) in 54.345S 001.974E, depth 10 km at 221211Z dec 99
    Bouvet Island Region
  41. USGS-USP0009JWY1999-12-16 → 1999-12-19
    Earthquake magnitude 5.7 (mwc) in 28.939S 013.342W, depth 10 km at 161036Z dec 99
    Southern Mid-atlantic Ridge
  42. USGS-USP0009G4Q1999-10-18 → 1999-10-21
    Earthquake magnitude 6.3 (mwc) in 56.121S 026.578W, depth 33 km at 180243Z oct 99
    South Sandwich Islands Region
  43. USGS-USP0009EE01999-09-14 → 1999-09-17
    Earthquake magnitude 5.5 (mb) in 55.989S 027.809W, depth 33 km at 140401Z sep 99
    South Sandwich Islands Region
  44. USGS-USP0009DFC1999-08-21 → 1999-08-24
    Earthquake magnitude 6.2 (mwc) in 58.311S 013.196W, depth 10 km at 212151Z aug 99
    East of the South Sandwich Islands
  45. USGS-USP0009AB81999-06-22 → 1999-06-25
    Earthquake magnitude 5.5 (mwc) in 56.274S 027.638W, depth 96 km at 221848Z jun 99
    South Sandwich Islands Region
  46. USGS-USP00099JJ1999-06-09 → 1999-06-12
    Earthquake magnitude 5.8 (mwc) in 53.039S 046.839W, depth 10 km at 090405Z jun 99
    South Atlantic Ocean
  47. USGS-USP00095PJ1999-04-03 → 1999-04-06
    Earthquake magnitude 5.5 (mwc) in 57.679S 027.078W, depth 150 km at 030031Z apr 99
    South Sandwich Islands Region
  48. USGS-USP00093JE1999-02-27 → 1999-03-02
    Earthquake magnitude 5.6 (mwc) in 49.243S 007.918W, depth 10 km at 271255Z feb 99
    Southern Mid-atlantic Ridge
  49. USGS-USP00090741998-12-26 → 1998-12-29
    Earthquake magnitude 5.6 (mwc) in 56.483S 027.366W, depth 110 km at 261214Z dec 98
    South Sandwich Islands Region
  50. USGS-USP0008VY11998-10-03 → 1998-10-06
    Earthquake magnitude 5.5 (mwc) in 56.605S 025.452W, depth 33 km at 031930Z oct 98
    South Sandwich Islands Region

Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts and your national MSI service.

Earthquake & tsunami bulletins in the South Atlantic Ocean — page 11 · seahazards