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-USP000FZBR2008-02-20 → 2008-02-23
    Earthquake magnitude 5.6 (mb) in 53.015S 046.542W, depth 10 km at 201249Z feb 08
    South Atlantic Ocean
  2. USGS-USP000FZBJ2008-02-20 → 2008-02-23
    Earthquake magnitude 5.5 (mb) in 52.917S 046.492W, depth 10 km at 201211Z feb 08
    South Atlantic Ocean
  3. USGS-USP000FY2R2008-02-03 → 2008-02-06
    Earthquake magnitude 5.6 (mwc) in 56.272S 027.043W, depth 100 km at 031424Z feb 08
    South Sandwich Islands Region
  4. USGS-USP000FXQ52008-01-29 → 2008-02-01
    Earthquake magnitude 5.6 (mwb) in 58.735S 025.240W, depth 35 km at 291457Z jan 08
    South Sandwich Islands Region
  5. USGS-USP000FT5J2007-11-23 → 2007-11-26
    Earthquake magnitude 5.5 (mwc) in 53.270S 009.426E, depth 10 km at 231918Z nov 07
    Southwest of Africa
  6. USGS-USP000FP5V2007-09-26 → 2007-09-29
    Earthquake magnitude 5.6 (mwc) in 7.074S 011.713W, depth 10 km at 261839Z sep 07
    Ascension Island Region
  7. USGS-USP000FK9H2007-08-20 → 2007-08-23
    Earthquake magnitude 5.7 (mwc) in 0.256S 018.175W, depth 10 km at 201237Z aug 07
    Central Mid-atlantic Ridge
  8. USGS-USP000FJXJ2007-08-16 → 2007-08-19
    Earthquake magnitude 5.5 (mwc) in 3.522S 012.153W, depth 10 km at 161418Z aug 07
    North of Ascension Island
  9. USGS-USP000FJMD2007-08-13 → 2007-08-16
    Earthquake magnitude 5.5 (mwc) in 30.994S 013.408W, depth 10 km at 132223Z aug 07
    Southern Mid-atlantic Ridge
  10. USGS-USP000FHP12007-08-02 → 2007-08-05
    Earthquake magnitude 5.5 (mwc) in 52.444S 017.647E, depth 10 km at 020719Z aug 07
    Southwest of Africa
  11. USGS-USP000FHJF2007-07-31 → 2007-08-03
    Earthquake magnitude 6.2 (mwc) in 0.162S 017.795W, depth 11 km at 312255Z jul 07
    North of Ascension Island
  12. USGS-USP000FHG02007-07-31 → 2007-08-03
    Earthquake magnitude 5.6 (mwb) in 56.058S 027.733W, depth 104 km at 310242Z jul 07
    South Sandwich Islands Region
  13. USGS-USP000FHA22007-07-28 → 2007-07-31
    Earthquake magnitude 5.5 (mwc) in 54.130S 007.881E, depth 10 km at 281613Z jul 07
    Bouvet Island Region
  14. USGS-USP000FEPK2007-06-24 → 2007-06-27
    Earthquake magnitude 6.5 (mwc) in 55.645S 002.626W, depth 10 km at 240025Z jun 07
    Southern Mid-atlantic Ridge
  15. USGS-USP000FE1T2007-06-15 → 2007-06-18
    Earthquake magnitude 5.5 (mwc) in 58.596S 026.244W, depth 147 km at 150348Z jun 07
    South Sandwich Islands Region
  16. USGS-USP000FDUD2007-06-11 → 2007-06-14
    Earthquake magnitude 5.5 (mwc) in 35.687S 016.144W, depth 10 km at 111713Z jun 07
    Southern Mid-atlantic Ridge
  17. USGS-USP000FD222007-05-30 → 2007-06-02
    Earthquake magnitude 5.5 (mwb) in 59.972S 026.457W, depth 35 km at 301935Z may 07
    South Sandwich Islands Region
  18. USGS-USP000FB7D2007-05-04 → 2007-05-07
    Earthquake magnitude 6.2 (mwb) in 1.410S 014.921W, depth 7 km at 041206Z may 07
    North of Ascension Island
  19. USGS-USP000FAY52007-04-30 → 2007-05-03
    Earthquake magnitude 5.6 (mwc) in 53.999S 006.081E, depth 10 km at 301538Z apr 07
    Bouvet Island Region
  20. USGS-USP000F6AZ2007-03-08 → 2007-03-11
    Earthquake magnitude 6.2 (mwc) in 58.217S 007.615W, depth 10 km at 081114Z mar 07
    East of the South Sandwich Islands
  21. USGS-USP000F5VA2007-02-28 → 2007-03-03
    Earthquake magnitude 6.2 (mwb) in 55.245S 029.142W, depth 10 km at 282313Z feb 07
    South Sandwich Islands Region
  22. USGS-USP000F3EX2007-01-23 → 2007-01-26
    Earthquake magnitude 5.6 (mwc) in 55.305S 029.382W, depth 35 km at 232246Z jan 07
    South Sandwich Islands Region
  23. USGS-USP000F35J2007-01-21 → 2007-01-24
    Earthquake magnitude 5.6 (mb) in 55.764S 027.016W, depth 48 km at 211503Z jan 07
    South Sandwich Islands Region
  24. USGS-USP000F31T2007-01-20 → 2007-01-23
    Earthquake magnitude 6.2 (mwc) in 55.419S 029.533W, depth 10 km at 200621Z jan 07
    South Sandwich Islands Region
  25. USGS-USP000F2VY2007-01-17 → 2007-01-20
    Earthquake magnitude 5.6 (mwb) in 57.911S 064.528W, depth 6 km at 171834Z jan 07
    Drake Passage
  26. USGS-USP000EZE22006-12-03 → 2006-12-06
    Earthquake magnitude 5.6 (mwc) in 0.538S 019.738W, depth 10 km at 030819Z dec 06
    Central Mid-atlantic Ridge
  27. USGS-USP000EY7A2006-11-19 → 2006-11-22
    Earthquake magnitude 5.7 (mwb) in 55.584S 024.871W, depth 10 km at 190155Z nov 06
    South Sandwich Islands Region
  28. USGS-USP000ENAF2006-07-10 → 2006-07-13
    Earthquake magnitude 5.5 (mwb) in 11.627S 013.432W, depth 10 km at 100721Z jul 06
    Ascension Island Region
  29. USGS-USP000EJ7B2006-05-29 → 2006-06-01
    Earthquake magnitude 5.7 (mwc) in 59.590S 026.235W, depth 44 km at 290520Z may 06
    South Sandwich Islands Region
  30. USGS-USP000ECEX2006-03-19 → 2006-03-22
    Earthquake magnitude 5.5 (mwc) in 58.051S 025.263W, depth 58 km at 190431Z mar 06
    South Sandwich Islands Region
  31. USGS-USP000EBQT2006-03-09 → 2006-03-12
    Earthquake magnitude 5.9 (mwb) in 59.542S 029.660W, depth 10 km at 090959Z mar 06
    South Sandwich Islands Region
  32. USGS-USP000EBAZ2006-03-03 → 2006-03-06
    Earthquake magnitude 6.0 (mwc) in 55.695S 004.232W, depth 10 km at 032336Z mar 06
    Southern Mid-atlantic Ridge
  33. USGS-USP000EANG2006-02-23 → 2006-02-26
    Earthquake magnitude 6.2 (mwb) in 54.669S 001.765E, depth 10 km at 230404Z feb 06
    Bouvet Island Region
  34. USGS-USP000EA7U2006-02-17 → 2006-02-20
    Earthquake magnitude 5.8 (mwc) in 1.480S 015.104W, depth 10 km at 171324Z feb 06
    North of Ascension Island
  35. USGS-USP000E7MY2006-01-05 → 2006-01-08
    Earthquake magnitude 5.7 (mwc) in 56.552S 024.954W, depth 10 km at 050840Z jan 06
    South Sandwich Islands Region
  36. USGS-USP000E3YV2005-11-11 → 2005-11-14
    Earthquake magnitude 5.9 (mwb) in 55.698S 027.063W, depth 29 km at 111458Z nov 05
    South Sandwich Islands Region
  37. USGS-USP000E3Q32005-11-07 → 2005-11-10
    Earthquake magnitude 5.5 (mwb) in 56.079S 027.350W, depth 114 km at 072211Z nov 05
    South Sandwich Islands Region
  38. USGS-USP000DZ4C2005-09-09 → 2005-09-12
    Earthquake magnitude 5.6 (mwc) in 56.038S 027.905W, depth 143 km at 091955Z sep 05
    South Sandwich Islands Region
  39. USGS-USP000DZ1Q2005-09-09 → 2005-09-12
    Earthquake magnitude 5.7 (mwc) in 55.645S 027.102W, depth 10 km at 090120Z sep 05
    South Sandwich Islands Region
  40. USGS-USP000DYPG2005-09-03 → 2005-09-06
    Earthquake magnitude 5.7 (mwc) in 49.930S 008.955W, depth 10 km at 031238Z sep 05
    Southern Mid-atlantic Ridge
  41. USGS-USP000DYCR2005-08-31 → 2005-09-03
    Earthquake magnitude 5.5 (mwc) in 59.360S 027.104W, depth 10 km at 310124Z aug 05
    South Sandwich Islands Region
  42. USGS-USP000DWNV2005-08-04 → 2005-08-07
    Earthquake magnitude 5.6 (mwb) in 59.768S 025.886W, depth 45 km at 041211Z aug 05
    South Sandwich Islands Region
  43. USGS-USP000DVX72005-07-25 → 2005-07-28
    Earthquake magnitude 5.6 (mwc) in 56.027S 027.760W, depth 85 km at 251945Z jul 05
    South Sandwich Islands Region
  44. USGS-USP000DSTT2005-06-12 → 2005-06-15
    Earthquake magnitude 6.0 (mwb) in 56.293S 027.075W, depth 94 km at 121926Z jun 05
    South Sandwich Islands Region
  45. USGS-USP000DR3B2005-05-18 → 2005-05-21
    Earthquake magnitude 6.0 (mwb) in 56.413S 026.863W, depth 102 km at 180910Z may 05
    South Sandwich Islands Region
  46. USGS-USP000DJWC2005-03-23 → 2005-03-26
    Earthquake magnitude 5.8 (mwb) in 55.475S 001.540W, depth 10 km at 231359Z mar 05
    Bouvet Island Region
  47. USGS-USP000DGB22005-02-17 → 2005-02-20
    Earthquake magnitude 5.6 (mwc) in 56.132S 027.418W, depth 103 km at 170119Z feb 05
    South Sandwich Islands Region
  48. USGS-USP000DGAD2005-02-16 → 2005-02-19
    Earthquake magnitude 6.6 (mwc) in 36.320S 016.558W, depth 10 km at 162027Z feb 05
    Southern Mid-atlantic Ridge
  49. USGS-USP000DF9W2005-01-31 → 2005-02-03
    Earthquake magnitude 5.6 (mwc) in 56.082S 027.403W, depth 109 km at 311356Z jan 05
    South Sandwich Islands Region
  50. USGS-USP000DF5R2005-01-29 → 2005-02-01
    Earthquake magnitude 5.5 (mwc) in 1.626S 015.516W, depth 10 km at 292101Z jan 05
    North of Ascension Island

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 9 · seahazards