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 · 0 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
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01
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07
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09
10
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14
15
16
17
18
19
20
21
22
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26

By month (all years)

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Other hazards in the South Atlantic Ocean

Archive · 582 cancelled

  1. USGS-US6000F4NZ2021-08-12 → 2021-08-15
    Earthquake magnitude 5.6 (mb) in 59.792S 026.508W, depth 50 km at 121929Z aug 21
    South Sandwich Islands Region
  2. USGS-US6000F4N32021-08-12 → 2021-08-15
    Earthquake magnitude 5.9 (mb) in 57.019S 025.201W, depth 25 km at 121907Z aug 21
    South Sandwich Islands Region
  3. USGS-US6000F4MR2021-08-12 → 2021-08-15
    Earthquake magnitude 5.9 (mb) in 57.019S 025.189W, depth 24 km at 121849Z aug 21
    South Sandwich Islands Region
  4. USGS-US6000F8YM2021-08-12 → 2021-08-15
    Earthquake magnitude 5.6 (mb) in 59.472S 025.665W, depth 35 km at 121847Z aug 21
    South Sandwich Islands Region
  5. USGS-US6000F8YD2021-08-12 → 2021-08-15
    Earthquake magnitude 6.7 (mb) in 59.981S 026.431W, depth 35 km at 121836Z aug 21
    South Sandwich Islands Region
  6. USGS-US6000F53E2021-08-12 → 2021-08-15
    2021 south sandwich islands earthquake
  7. USGS-US6000F4LY2021-08-12 → 2021-08-15
    Earthquake magnitude 7.5 (mww) in 57.567S 025.032W, depth 47 km at 121832Z aug 21
    South Sandwich Islands Region
  8. USGS-US6000F2ZA2021-08-06 → 2021-08-09
    Earthquake magnitude 5.9 (mww) in 59.604S 026.189W, depth 35 km at 061922Z aug 21
    South Sandwich Islands Region
  9. USGS-US6000F1SC2021-08-03 → 2021-08-06
    Earthquake magnitude 5.5 (mww) in 52.749S 018.468E, depth 10 km at 030643Z aug 21
    Southwest of Africa
  10. USGS-US7000EMRG2021-07-17 → 2021-07-20
    Earthquake magnitude 5.7 (mww) in 56.070S 027.797W, depth 97 km at 170053Z jul 21
    South Sandwich Islands Region
  11. USGS-US7000EFCT2021-06-23 → 2021-06-26
    Earthquake magnitude 5.5 (mww) in 58.144S 063.764W, depth 10 km at 230047Z jun 21
    Drake Passage
  12. USGS-US6000DYND2021-04-03 → 2021-04-06
    Earthquake magnitude 6.6 (mww) in 58.014S 007.843W, depth 10 km at 030116Z apr 21
    East of the South Sandwich Islands
  13. USGS-US7000DJAM2021-03-14 → 2021-03-17
    Earthquake magnitude 5.5 (mww) in 59.531S 029.745W, depth 10 km at 141335Z mar 21
    South Sandwich Islands Region
  14. USGS-US7000DJ9V2021-03-14 → 2021-03-17
    Earthquake magnitude 6.0 (mww) in 59.871S 029.482W, depth 10 km at 141205Z mar 21
    South Sandwich Islands Region
  15. USGS-US7000D0BW2021-01-15 → 2021-01-18
    Earthquake magnitude 5.5 (mww) in 37.073S 017.012W, depth 10 km at 151319Z jan 21
    Southern Mid-atlantic Ridge
  16. USGS-US7000D0AE2021-01-15 → 2021-01-18
    Earthquake magnitude 5.6 (mww) in 37.123S 017.255W, depth 10 km at 151045Z jan 21
    Southern Mid-atlantic Ridge
  17. USGS-US6000D7HN2021-01-11 → 2021-01-14
    Earthquake magnitude 5.5 (mww) in 58.050S 009.843W, depth 10 km at 111944Z jan 21
    East of the South Sandwich Islands
  18. USGS-US6000D4542020-12-29 → 2021-01-01
    Earthquake magnitude 5.7 (mww) in 0.760S 021.101W, depth 10 km at 292334Z dec 20
    Central Mid-atlantic Ridge
  19. USGS-US6000C0CS2020-09-24 → 2020-09-27
    Earthquake magnitude 5.8 (mww) in 0.236S 018.807W, depth 10 km at 240027Z sep 20
    Central Mid-atlantic Ridge
  20. USGS-US7000BFGL2020-08-31 → 2020-09-03
    Earthquake magnitude 5.9 (mww) in 35.438S 015.614W, depth 10 km at 312118Z aug 20
    Tristan Da Cunha Region
  21. USGS-US7000BE5J2020-08-28 → 2020-08-31
    Earthquake magnitude 5.9 (mww) in 54.767S 001.476E, depth 10 km at 280224Z aug 20
    Bouvet Island Region
  22. USGS-US6000BIZY2020-08-22 → 2020-08-25
    Earthquake magnitude 5.5 (mww) in 7.135S 012.970W, depth 10 km at 221021Z aug 20
    Ascension Island Region
  23. USGS-US6000BIYJ2020-08-22 → 2020-08-25
    178 km ene of georgetown, saint helena
  24. USGS-US6000BBMW2020-08-09 → 2020-08-12
    Earthquake magnitude 5.7 (mww) in 53.017S 011.580E, depth 10 km at 092342Z aug 20
    Southwest of Africa
  25. USGS-US6000B7WU2020-08-01 → 2020-08-04
    Earthquake magnitude 5.5 (mww) in 22.924S 013.500W, depth 10 km at 010917Z aug 20
    Southern Mid-atlantic Ridge
  26. USGS-US7000AEL82020-06-29 → 2020-07-02
    Earthquake magnitude 5.7 (mww) in 11.506S 013.531W, depth 10 km at 291940Z jun 20
    Ascension Island Region
  27. USGS-US6000A9IK2020-06-10 → 2020-06-13
    Earthquake magnitude 6.0 (mww) in 15.807S 013.036W, depth 10 km at 101958Z jun 20
    Southern Mid-atlantic Ridge
  28. USGS-US70009PAG2020-05-24 → 2020-05-27
    Earthquake magnitude 5.8 (mww) in 47.294S 012.295W, depth 10 km at 240252Z may 20
    Southern Mid-atlantic Ridge
  29. USGS-US70008E742020-03-22 → 2020-03-25
    Earthquake magnitude 5.6 (mww) in 0.705S 021.177W, depth 10 km at 222043Z mar 20
    Central Mid-atlantic Ridge
  30. USGS-US70007LIK2020-02-08 → 2020-02-11
    Earthquake magnitude 6.0 (mww) in 59.921S 025.553W, depth 16 km at 081432Z feb 20
    South Sandwich Islands Region
  31. USGS-US70007L2H2020-02-07 → 2020-02-10
    Earthquake magnitude 5.5 (mww) in 59.392S 060.212W, depth 10 km at 071852Z feb 20
    Drake Passage
  32. USGS-US60007B5X2020-01-20 → 2020-01-23
    Earthquake magnitude 6.1 (mww) in 59.228S 026.282W, depth 93 km at 200651Z jan 20
    South Sandwich Islands Region
  33. USGS-US700071IJ2020-01-17 → 2020-01-20
    Earthquake magnitude 5.8 (mww) in 11.637S 013.782W, depth 10 km at 170637Z jan 20
    Ascension Island Region
  34. USGS-US70006YLA2020-01-12 → 2020-01-15
    Earthquake magnitude 5.6 (mww) in 54.395S 005.206E, depth 10 km at 120227Z jan 20
    Bouvet Island Region
  35. USGS-US60006PBW2019-12-09 → 2019-12-12
    Earthquake magnitude 5.6 (mww) in 52.836S 011.387E, depth 10 km at 091759Z dec 19
    Southwest of Africa
  36. USGS-US700063MH2019-11-05 → 2019-11-08
    Earthquake magnitude 6.3 (mww) in 57.924S 009.322W, depth 10 km at 052052Z nov 19
    East of the South Sandwich Islands
  37. USGS-US700062CG2019-11-02 → 2019-11-05
    Earthquake magnitude 6.1 (mww) in 55.735S 026.240W, depth 8 km at 021808Z nov 19
    South Sandwich Islands Region
  38. USGS-US70005XR72019-10-23 → 2019-10-26
    Earthquake magnitude 6.3 (mww) in 1.099S 013.837W, depth 10 km at 231608Z oct 19
    North of Ascension Island
  39. USGS-US70005U6Q2019-10-14 → 2019-10-17
    Earthquake magnitude 5.5 (mww) in 55.800S 027.076W, depth 19 km at 142133Z oct 19
    South Sandwich Islands Region
  40. USGS-US70005TTV2019-10-13 → 2019-10-16
    Earthquake magnitude 5.5 (mww) in 56.330S 026.199W, depth 20 km at 130609Z oct 19
    South Sandwich Islands Region
  41. USGS-US700047G72019-06-29 → 2019-07-02
    Earthquake magnitude 5.5 (mww) in 1.715S 013.010W, depth 10 km at 291951Z jun 19
    North of Ascension Island
  42. USGS-US600045DG2019-06-24 → 2019-06-27
    Earthquake magnitude 5.5 (mww) in 57.989S 025.392W, depth 26 km at 241921Z jun 19
    South Sandwich Islands Region
  43. USGS-US6000408I2019-06-13 → 2019-06-16
    Earthquake magnitude 5.7 (mww) in 35.730S 017.193W, depth 10 km at 130300Z jun 19
    Southern Mid-atlantic Ridge
  44. USGS-US60003SV92019-05-27 → 2019-05-30
    Earthquake magnitude 5.7 (mww) in 56.337S 027.778W, depth 115 km at 272329Z may 19
    South Sandwich Islands Region
  45. USGS-US70003A912019-04-22 → 2019-04-25
    Earthquake magnitude 6.0 (mww) in 56.263S 027.351W, depth 79 km at 221449Z apr 19
    South Sandwich Islands Region
  46. USGS-US700036WE2019-04-16 → 2019-04-19
    Earthquake magnitude 5.7 (mww) in 35.297S 015.486W, depth 10 km at 160730Z apr 19
    Tristan Da Cunha Region
  47. USGS-US600032FG2019-04-09 → 2019-04-12
    Earthquake magnitude 6.5 (mww) in 58.626S 025.304W, depth 38 km at 091753Z apr 19
    South Sandwich Islands Region
  48. USGS-US2000KAV92019-04-05 → 2019-04-08
    Earthquake magnitude 6.4 (mww) in 55.931S 027.852W, depth 57 km at 051614Z apr 19
    South Sandwich Islands Region
  49. USGS-US2000ISC82018-12-11 → 2018-12-14
    Earthquake magnitude 7.1 (mww) in 58.545S 026.386W, depth 133 km at 110226Z dec 18
    South Sandwich Islands Region
  50. USGS-US1000I0T92018-12-02 → 2018-12-05
    Earthquake magnitude 5.5 (mww) in 52.571S 017.998E, depth 10 km at 022313Z dec 18
    Southwest of Africa

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 4 · seahazards