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
    Earthquake magnitude 6.2 (mww) in 56.206S 027.909W, depth 126 km at 022346Z sep 26
    South Sandwich Islands Region

Longest in force

  1. USGS-US7000TDRVin force2026-09-02 · 0 d
    Earthquake magnitude 6.2 (mww) in 56.206S 027.909W, depth 126 km at 022346Z sep 26
    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-US7000LTUS2024-01-25 → 2024-01-28
    Earthquake magnitude 5.5 (mww) in 1.149S 013.961W, depth 10 km at 252301Z jan 24
    North of Ascension Island
  2. USGS-US6000M4EJ2024-01-18 → 2024-01-21
    Earthquake magnitude 5.6 (mww) in 55.355S 028.506W, depth 8 km at 181246Z jan 24
    South Sandwich Islands Region
  3. USGS-US7000LKB02023-12-20 → 2023-12-23
    Earthquake magnitude 5.6 (mww) in 56.153S 027.735W, depth 110 km at 201209Z dec 23
    South Sandwich Islands Region
  4. USGS-US7000LJF22023-12-15 → 2023-12-18
    Earthquake magnitude 5.9 (mww) in 35.965S 017.009W, depth 10 km at 152223Z dec 23
    Southern Mid-atlantic Ridge
  5. USGS-US7000LEQE2023-11-30 → 2023-12-03
    Earthquake magnitude 5.8 (mww) in 56.293S 027.325W, depth 99 km at 300754Z nov 23
    South Sandwich Islands Region
  6. USGS-US7000L94T2023-11-06 → 2023-11-09
    Earthquake magnitude 5.5 (mww) in 1.217S 024.130W, depth 10 km at 061204Z nov 23
    Central Mid-atlantic Ridge
  7. USGS-US7000KR1S2023-08-25 → 2023-08-28
    Earthquake magnitude 5.5 (mww) in 39.563S 016.037W, depth 10 km at 252047Z aug 23
    Southern Mid-atlantic Ridge
  8. USGS-US7000KPP42023-08-20 → 2023-08-23
    Earthquake magnitude 5.7 (mww) in 56.001S 027.616W, depth 79 km at 201959Z aug 23
    South Sandwich Islands Region
  9. USGS-US7000KP6M2023-08-18 → 2023-08-21
    Earthquake magnitude 5.7 (mww) in 0.452S 019.727W, depth 10 km at 180757Z aug 23
    Central Mid-atlantic Ridge
  10. USGS-US7000KP2G2023-08-17 → 2023-08-20
    Earthquake magnitude 6.0 (mww) in 0.329S 019.580W, depth 10 km at 171641Z aug 23
    Central Mid-atlantic Ridge
  11. USGS-US6000KYJ52023-08-07 → 2023-08-10
    Earthquake magnitude 5.6 (mww) in 55.749S 027.044W, depth 13 km at 072349Z aug 23
    South Sandwich Islands Region
  12. USGS-US6000KYA42023-08-06 → 2023-08-09
    Earthquake magnitude 5.7 (mww) in 55.706S 027.106W, depth 12 km at 061417Z aug 23
    South Sandwich Islands Region
  13. USGS-US6000KWB42023-07-28 → 2023-07-31
    Earthquake magnitude 5.5 (mb) in 58.765S 025.190W, depth 37 km at 281935Z jul 23
    South Sandwich Islands Region
  14. USGS-US6000KQ0U2023-07-04 → 2023-07-07
    Earthquake magnitude 5.9 (mww) in 58.129S 012.847W, depth 10 km at 041201Z jul 23
    East of the South Sandwich Islands
  15. USGS-US7000KA0Y2023-06-21 → 2023-06-24
    Earthquake magnitude 5.5 (mww) in 12.767S 014.748W, depth 10 km at 210410Z jun 23
    Southern Mid-atlantic Ridge
  16. USGS-US7000K7ID2023-06-09 → 2023-06-12
    Earthquake magnitude 5.7 (mww) in 47.319S 012.624W, depth 10 km at 092043Z jun 23
    Southern Mid-atlantic Ridge
  17. USGS-US7000K4UG2023-05-29 → 2023-06-01
    Earthquake magnitude 5.5 (mww) in 52.879S 010.462E, depth 10 km at 292152Z may 23
    Southwest of Africa
  18. USGS-US7000K4GS2023-05-27 → 2023-05-30
    Earthquake magnitude 5.5 (mww) in 57.937S 025.602W, depth 46 km at 271521Z may 23
    South Sandwich Islands Region
  19. USGS-US7000JWFX2023-04-28 → 2023-05-01
    Earthquake magnitude 5.7 (mww) in 59.931S 027.899W, depth 107 km at 280107Z apr 23
    South Sandwich Islands Region
  20. USGS-US6000K34X2023-04-09 → 2023-04-12
    Earthquake magnitude 5.7 (mww) in 48.298S 009.920W, depth 10 km at 092211Z apr 23
    Southern Mid-atlantic Ridge
  21. USGS-US7000JGZB2023-03-03 → 2023-03-06
    Earthquake magnitude 5.9 (mww) in 59.403S 017.999W, depth 10 km at 030453Z mar 23
    East of the South Sandwich Islands
  22. USGS-US6000JPZJ2023-02-18 → 2023-02-21
    Earthquake magnitude 5.7 (mww) in 55.418S 027.804W, depth 13 km at 182127Z feb 23
    South Sandwich Islands Region
  23. USGS-US6000JNB32023-02-11 → 2023-02-14
    Earthquake magnitude 5.6 (mww) in 35.362S 015.570W, depth 10 km at 111531Z feb 23
    Tristan Da Cunha Region
  24. USGS-US6000J8JD2022-12-11 → 2022-12-14
    Earthquake magnitude 5.6 (mww) in 58.731S 025.427W, depth 32 km at 110640Z dec 22
    South Sandwich Islands Region
  25. USGS-US6000J6A92022-12-02 → 2022-12-05
    Earthquake magnitude 5.6 (mww) in 53.948S 002.729E, depth 10 km at 021235Z dec 22
    Bouvet Island Region
  26. USGS-US7000IRMA2022-11-22 → 2022-11-25
    Earthquake magnitude 5.5 (mb) in 59.925S 027.865W, depth 119 km at 222113Z nov 22
    South Sandwich Islands Region
  27. USGS-US7000IQVT2022-11-19 → 2022-11-22
    Earthquake magnitude 5.5 (mww) in 52.313S 013.783E, depth 10 km at 190049Z nov 22
    Southwest of Africa
  28. USGS-US7000IMAX2022-11-03 → 2022-11-06
    Earthquake magnitude 5.5 (mww) in 41.020S 016.651W, depth 10 km at 032059Z nov 22
    Southern Mid-atlantic Ridge
  29. USGS-US6000IW742022-10-25 → 2022-10-28
    Earthquake magnitude 6.3 (mww) in 58.777S 026.141W, depth 79 km at 250013Z oct 22
    South Sandwich Islands Region
  30. USGS-US6000IUVX2022-10-19 → 2022-10-22
    81 km ene of georgetown, saint helena
  31. USGS-US6000ISAU2022-10-09 → 2022-10-12
    Earthquake magnitude 6.2 (mww) in 1.364S 023.904W, depth 10 km at 091638Z oct 22
    Central Mid-atlantic Ridge
  32. USGS-US6000IQ752022-10-02 → 2022-10-05
    Earthquake magnitude 5.7 (mww) in 57.737S 025.381W, depth 23 km at 021305Z oct 22
    South Sandwich Islands Region
  33. USGS-US7000I5MY2022-09-06 → 2022-09-09
    Earthquake magnitude 5.7 (mww) in 56.526S 025.761W, depth 15 km at 061214Z sep 22
    South Sandwich Islands Region
  34. USGS-US7000I5KW2022-09-06 → 2022-09-09
    Earthquake magnitude 5.9 (mww) in 56.574S 025.766W, depth 11 km at 060832Z sep 22
    South Sandwich Islands Region
  35. USGS-US7000I53F2022-09-04 → 2022-09-07
    Earthquake magnitude 6.9 (mww) in 0.934S 021.715W, depth 10 km at 040942Z sep 22
    Central Mid-atlantic Ridge
  36. USGS-US6000IC292022-08-19 → 2022-08-22
    Earthquake magnitude 5.5 (mww) in 20.397S 011.609W, depth 10 km at 190712Z aug 22
    Southern Mid-atlantic Ridge
  37. USGS-US7000HGP62022-06-11 → 2022-06-14
    87 km e of georgetown, saint helena
  38. USGS-US7000HEU82022-06-04 → 2022-06-07
    Earthquake magnitude 5.6 (mww) in 58.773S 025.588W, depth 44 km at 040259Z jun 22
    South Sandwich Islands Region
  39. USGS-US6000HN9M2022-05-23 → 2022-05-26
    Earthquake magnitude 5.5 (mww) in 58.035S 025.266W, depth 23 km at 231158Z may 22
    South Sandwich Islands Region
  40. USGS-US6000HKRD2022-05-13 → 2022-05-16
    Earthquake magnitude 5.5 (mww) in 56.327S 027.622W, depth 10 km at 130323Z may 22
    South Sandwich Islands Region
  41. USGS-US7000H6B82022-05-02 → 2022-05-05
    Earthquake magnitude 5.6 (mww) in 57.070S 025.152W, depth 10 km at 020602Z may 22
    South Sandwich Islands Region
  42. USGS-US6000HF722022-04-21 → 2022-04-24
    Earthquake magnitude 5.5 (mww) in 42.856S 016.002W, depth 10 km at 210620Z apr 22
    Southern Mid-atlantic Ridge
  43. USGS-US6000HF6U2022-04-21 → 2022-04-24
    Earthquake magnitude 5.5 (mww) in 42.953S 015.959W, depth 10 km at 210612Z apr 22
    Tristan Da Cunha Region
  44. USGS-US7000GZYQ2022-04-05 → 2022-04-08
    Earthquake magnitude 5.7 (mww) in 57.997S 025.474W, depth 45 km at 052126Z apr 22
    South Sandwich Islands Region
  45. USGS-US6000H6BA2022-03-21 → 2022-03-24
    Earthquake magnitude 5.6 (mww) in 58.255S 023.489W, depth 10 km at 210515Z mar 22
    South Sandwich Islands Region
  46. USGS-US6000H5JZ2022-03-17 → 2022-03-20
    Earthquake magnitude 5.5 (mww) in 11.455S 012.975W, depth 10 km at 172225Z mar 22
    Ascension Island Region
  47. USGS-US6000H2L52022-03-06 → 2022-03-09
    Earthquake magnitude 6.0 (mww) in 58.731S 024.917W, depth 20 km at 062014Z mar 22
    South Sandwich Islands Region
  48. USGS-US6000H06R2022-02-25 → 2022-02-28
    Earthquake magnitude 5.8 (mww) in 59.618S 026.343W, depth 40 km at 252152Z feb 22
    South Sandwich Islands Region
  49. USGS-US6000GZPF2022-02-24 → 2022-02-27
    Earthquake magnitude 5.5 (mww) in 58.459S 029.744W, depth 10 km at 240352Z feb 22
    South Sandwich Islands Region
  50. USGS-US7000GLK22022-02-17 → 2022-02-20
    Earthquake magnitude 5.6 (mww) in 59.191S 023.733W, depth 10 km at 170403Z feb 22
    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 2 · seahazards