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-USP000DD5A2005-01-12 → 2005-01-15
    Earthquake magnitude 6.8 (mwb) in 0.878S 021.194W, depth 10 km at 120840Z jan 05
    Central Mid-atlantic Ridge
  2. USGS-USP000DCTY2005-01-08 → 2005-01-11
    Earthquake magnitude 6.0 (mwb) in 55.299S 027.956W, depth 10 km at 081845Z jan 05
    South Sandwich Islands Region
  3. USGS-USP000D7UZ2004-11-07 → 2004-11-10
    Earthquake magnitude 5.8 (mwb) in 55.500S 029.049W, depth 39 km at 070241Z nov 04
    South Sandwich Islands Region
  4. USGS-USP000D7552004-10-26 → 2004-10-29
    Earthquake magnitude 5.5 (mwc) in 56.984S 024.638W, depth 10 km at 262325Z oct 04
    South Sandwich Islands Region
  5. USGS-USP000D7542004-10-26 → 2004-10-29
    Earthquake magnitude 6.4 (mwb) in 57.071S 024.679W, depth 10 km at 262253Z oct 04
    South Sandwich Islands Region
  6. USGS-USP000D7502004-10-26 → 2004-10-29
    Earthquake magnitude 6.0 (mwb) in 57.067S 024.829W, depth 10 km at 262048Z oct 04
    South Sandwich Islands Region
  7. USGS-USP000D60Q2004-10-08 → 2004-10-11
    Earthquake magnitude 5.8 (mwc) in 56.529S 026.868W, depth 102 km at 081528Z oct 04
    South Sandwich Islands Region
  8. USGS-USP000D59E2004-09-29 → 2004-10-02
    Earthquake magnitude 5.5 (mwc) in 58.719S 025.458W, depth 51 km at 290200Z sep 04
    South Sandwich Islands Region
  9. USGS-USP000D4VQ2004-09-22 → 2004-09-25
    Earthquake magnitude 5.5 (mwc) in 55.102S 028.419W, depth 10 km at 222050Z sep 04
    South Sandwich Islands Region
  10. USGS-USP000D43U2004-09-11 → 2004-09-14
    Earthquake magnitude 6.1 (mwb) in 57.976S 025.342W, depth 64 km at 112152Z sep 04
    South Sandwich Islands Region
  11. USGS-USP000D3XA2004-09-08 → 2004-09-11
    Earthquake magnitude 5.6 (mwc) in 52.157S 004.966W, depth 10 km at 081540Z sep 04
    Southern Mid-atlantic Ridge
  12. USGS-USP000D3SK2004-09-06 → 2004-09-09
    Earthquake magnitude 5.6 (mwc) in 55.360S 028.929W, depth 10 km at 062118Z sep 04
    South Sandwich Islands Region
  13. USGS-USP000D3SJ2004-09-06 → 2004-09-09
    Earthquake magnitude 5.6 (mwc) in 55.220S 029.193W, depth 10 km at 062117Z sep 04
    South Sandwich Islands Region
  14. USGS-USP000D3RF2004-09-06 → 2004-09-09
    Earthquake magnitude 5.7 (mwc) in 55.369S 028.893W, depth 10 km at 061441Z sep 04
    South Sandwich Islands Region
  15. USGS-USP000D3R92004-09-06 → 2004-09-09
    Earthquake magnitude 5.8 (mwc) in 55.261S 028.780W, depth 10 km at 061417Z sep 04
    South Sandwich Islands Region
  16. USGS-USP000D3QV2004-09-06 → 2004-09-09
    Earthquake magnitude 6.9 (mwb) in 55.372S 028.976W, depth 10 km at 061242Z sep 04
    South Sandwich Islands Region
  17. USGS-USP000D2PJ2004-08-23 → 2004-08-26
    Earthquake magnitude 5.5 (mwb) in 25.015S 013.715W, depth 10 km at 230057Z aug 04
    Southern Mid-atlantic Ridge
  18. USGS-USP000D14T2004-07-30 → 2004-08-02
    Earthquake magnitude 5.5 (mwb) in 57.261S 025.802W, depth 62 km at 301214Z jul 04
    South Sandwich Islands Region
  19. USGS-USP000CWD02004-05-27 → 2004-05-30
    Earthquake magnitude 5.5 (mwc) in 14.199S 014.427W, depth 10 km at 271511Z may 04
    Southern Mid-atlantic Ridge
  20. USGS-USP000CUCB2004-05-07 → 2004-05-10
    Earthquake magnitude 5.5 (mwc) in 57.907S 025.535W, depth 72 km at 070950Z may 04
    South Sandwich Islands Region
  21. USGS-USP000CU8F2004-05-05 → 2004-05-08
    Earthquake magnitude 5.5 (mwc) in 57.186S 025.410W, depth 54 km at 052059Z may 04
    South Sandwich Islands Region
  22. USGS-USP000CU702004-05-05 → 2004-05-08
    Earthquake magnitude 5.9 (mwc) in 58.182S 011.385W, depth 10 km at 050457Z may 04
    East of the South Sandwich Islands
  23. USGS-USP000CRZG2004-04-08 → 2004-04-11
    Earthquake magnitude 5.5 (mwb) in 55.677S 027.874W, depth 35 km at 081022Z apr 04
    South Sandwich Islands Region
  24. USGS-USP000CMQQ2004-02-21 → 2004-02-24
    Earthquake magnitude 6.6 (mwb) in 58.425S 014.963W, depth 10 km at 210234Z feb 04
    East of the South Sandwich Islands
  25. USGS-USP000CJ6D2004-01-18 → 2004-01-21
    Earthquake magnitude 5.6 (mwb) in 47.038S 011.282W, depth 10 km at 181407Z jan 04
    Southern Mid-atlantic Ridge
  26. USGS-USP000CFUV2003-12-23 → 2003-12-26
    Earthquake magnitude 5.8 (mwb) in 0.696S 020.330W, depth 10 km at 230558Z dec 03
    Central Mid-atlantic Ridge
  27. USGS-USP000CFQJ2003-12-21 → 2003-12-24
    Earthquake magnitude 6.6 (mwc) in 0.769S 020.601W, depth 10 km at 210740Z dec 03
    Central Mid-atlantic Ridge
  28. USGS-USP000CCG32003-11-09 → 2003-11-12
    Earthquake magnitude 6.6 (mwc) in 0.674S 019.689W, depth 10 km at 091952Z nov 03
    Central Mid-atlantic Ridge
  29. USGS-USP000CAW22003-10-20 → 2003-10-23
    Earthquake magnitude 5.6 (mwb) in 58.090S 026.248W, depth 157 km at 201650Z oct 03
    South Sandwich Islands Region
  30. USGS-USP000C88V2003-09-21 → 2003-09-24
    Earthquake magnitude 6.0 (mwc) in 1.007S 014.059W, depth 10 km at 212315Z sep 03
    North of Ascension Island
  31. USGS-USP000C8442003-09-20 → 2003-09-23
    Earthquake magnitude 5.5 (mwb) in 55.879S 027.909W, depth 117 km at 201738Z sep 03
    South Sandwich Islands Region
  32. USGS-USP000C6X52003-09-06 → 2003-09-09
    Earthquake magnitude 5.7 (mwc) in 57.419S 025.639W, depth 33 km at 061546Z sep 03
    South Sandwich Islands Region
  33. USGS-USP000C6TR2003-09-05 → 2003-09-08
    Earthquake magnitude 5.5 (mwc) in 54.715S 001.089E, depth 10 km at 050746Z sep 03
    Bouvet Island Region
  34. USGS-USP000C66N2003-08-29 → 2003-09-01
    Earthquake magnitude 5.5 (mwc) in 59.286S 024.877W, depth 10 km at 290941Z aug 03
    South Sandwich Islands Region
  35. USGS-USP000C3TS2003-08-01 → 2003-08-04
    Earthquake magnitude 5.5 (mwc) in 54.647S 001.253E, depth 10 km at 010137Z aug 03
    Bouvet Island Region
  36. USGS-USP000C3562003-07-23 → 2003-07-26
    Earthquake magnitude 5.8 (mwb) in 15.592S 013.351W, depth 10 km at 231638Z jul 03
    Southern Mid-atlantic Ridge
  37. USGS-USP000BVCX2003-04-17 → 2003-04-20
    Earthquake magnitude 6.5 (mwb) in 54.624S 001.432E, depth 10 km at 171450Z apr 03
    Bouvet Island Region
  38. USGS-USP000BSUP2003-03-17 → 2003-03-20
    Earthquake magnitude 5.8 (mwb) in 58.203S 011.203W, depth 10 km at 170410Z mar 03
    East of the South Sandwich Islands
  39. USGS-USP000BRTU2003-03-02 → 2003-03-05
    Earthquake magnitude 5.6 (mwc) in 55.252S 028.008W, depth 33 km at 021758Z mar 03
    South Sandwich Islands Region
  40. USGS-USP000BRTM2003-03-02 → 2003-03-05
    Earthquake magnitude 6.2 (mwb) in 36.958S 020.879W, depth 10 km at 021642Z mar 03
    Southern Mid-atlantic Ridge
  41. USGS-USP000BQPZ2003-02-14 → 2003-02-17
    Earthquake magnitude 5.7 (mwc) in 54.471S 005.742E, depth 10 km at 142317Z feb 03
    Bouvet Island Region
  42. USGS-USP000BMUC2003-01-01 → 2003-01-04
    Earthquake magnitude 5.6 (mwc) in 48.127S 009.789W, depth 10 km at 010014Z jan 03
    Southern Mid-atlantic Ridge
  43. USGS-USP000BKXP2002-12-18 → 2002-12-21
    Earthquake magnitude 6.1 (mwc) in 57.092S 024.981W, depth 10 km at 181412Z dec 02
    South Sandwich Islands Region
  44. USGS-USP000BKWR2002-12-18 → 2002-12-21
    Earthquake magnitude 5.6 (mwc) in 56.996S 025.205W, depth 10 km at 180147Z dec 02
    South Sandwich Islands Region
  45. USGS-USP000BKUV2002-12-17 → 2002-12-20
    Earthquake magnitude 6.2 (mwc) in 56.952S 024.825W, depth 10 km at 170432Z dec 02
    South Sandwich Islands Region
  46. USGS-USP000BHRF2002-11-15 → 2002-11-18
    Earthquake magnitude 6.6 (mwc) in 56.051S 036.404W, depth 10 km at 151958Z nov 02
    South Georgia Island Region
  47. USGS-USP000BHQN2002-11-15 → 2002-11-18
    Earthquake magnitude 5.9 (mwc) in 55.718S 035.782W, depth 10 km at 151305Z nov 02
    South Georgia Island Region
  48. USGS-USP000BHG42002-11-12 → 2002-11-15
    Earthquake magnitude 6.2 (mwc) in 56.550S 027.536W, depth 120 km at 120146Z nov 02
    South Sandwich Islands Region
  49. USGS-USP000BD5K2002-09-26 → 2002-09-29
    Earthquake magnitude 5.7 (mwc) in 19.648S 012.014W, depth 10 km at 261255Z sep 02
    Southern Mid-atlantic Ridge
  50. USGS-USP000B9AG2002-08-04 → 2002-08-07
    Earthquake magnitude 6.0 (mwb) in 35.457S 016.238W, depth 10 km at 041516Z aug 02
    Southern Mid-atlantic Ridge

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 10 · seahazards