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
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-USP000HQM22010-12-07 → 2010-12-10
    Earthquake magnitude 5.7 (mwc) in 58.019S 007.503W, depth 10 km at 070531Z dec 10
    East of the South Sandwich Islands
  2. USGS-USP000HQM12010-12-07 → 2010-12-10
    Earthquake magnitude 5.9 (mwc) in 57.932S 007.474W, depth 10 km at 070427Z dec 10
    East of the South Sandwich Islands
  3. USGS-USP000HK792010-09-04 → 2010-09-07
    Earthquake magnitude 5.5 (mwc) in 59.075S 025.494W, depth 35 km at 041151Z sep 10
    South Sandwich Islands Region
  4. USGS-USP000HJWF2010-08-29 → 2010-09-01
    Earthquake magnitude 5.5 (mwc) in 55.800S 026.991W, depth 35 km at 290637Z aug 10
    South Sandwich Islands Region
  5. USGS-USP000HH7Q2010-07-31 → 2010-08-03
    Earthquake magnitude 5.5 (mwc) in 0.763S 016.025W, depth 10 km at 311136Z jul 10
    North of Ascension Island
  6. USGS-USP000HG6S2010-07-20 → 2010-07-23
    Earthquake magnitude 5.8 (mwc) in 29.031S 013.096W, depth 10 km at 201719Z jul 10
    Southern Mid-atlantic Ridge
  7. USGS-USP000HDFX2010-06-02 → 2010-06-05
    Earthquake magnitude 5.9 (mwb) in 57.369S 026.446W, depth 127 km at 020149Z jun 10
    South Sandwich Islands Region
  8. USGS-USP000HBWG2010-04-25 → 2010-04-28
    Earthquake magnitude 5.6 (mwb) in 55.606S 027.730W, depth 7 km at 252109Z apr 10
    South Sandwich Islands Region
  9. USGS-USP000HBBA2010-04-13 → 2010-04-16
    Earthquake magnitude 5.5 (mwc) in 56.331S 027.311W, depth 100 km at 132027Z apr 10
    South Sandwich Islands Region
  10. USGS-USP000H9DP2010-03-14 → 2010-03-17
    Earthquake magnitude 5.6 (mwc) in 58.417S 023.567W, depth 40 km at 142233Z mar 10
    South Sandwich Islands Region
  11. USGS-USP000H93Z2010-03-11 → 2010-03-14
    Earthquake magnitude 5.6 (mwc) in 57.285S 027.931W, depth 308 km at 110622Z mar 10
    South Sandwich Islands Region
  12. USGS-USP000H7PQ2010-02-26 → 2010-03-01
    Earthquake magnitude 5.6 (mwc) in 55.758S 004.758W, depth 6 km at 260011Z feb 10
    Southern Mid-atlantic Ridge
  13. USGS-USP000H7662010-02-11 → 2010-02-14
    Earthquake magnitude 5.5 (mwc) in 40.593S 016.769W, depth 10 km at 111151Z feb 10
    Southern Mid-atlantic Ridge
  14. USGS-USP000H6PH2010-01-27 → 2010-01-30
    Earthquake magnitude 5.8 (mwc) in 14.100S 014.554W, depth 10 km at 271742Z jan 10
    Southern Mid-atlantic Ridge
  15. USGS-USP000H68A2010-01-17 → 2010-01-20
    Earthquake magnitude 6.3 (mwc) in 57.664S 065.879W, depth 5 km at 171200Z jan 10
    Drake Passage
  16. USGS-USP000H5T42010-01-06 → 2010-01-09
    Earthquake magnitude 5.6 (mwc) in 41.605S 016.568W, depth 10 km at 061638Z jan 10
    Southern Mid-atlantic Ridge
  17. USGS-USP000H5RA2010-01-05 → 2010-01-08
    Earthquake magnitude 6.8 (mwc) in 58.173S 014.695W, depth 13 km at 050455Z jan 10
    East of the South Sandwich Islands
  18. USGS-USP000H52Z2009-12-16 → 2009-12-19
    Earthquake magnitude 5.5 (mwc) in 55.488S 026.898W, depth 11 km at 160340Z dec 09
    South Sandwich Islands Region
  19. USGS-USP000H4WQ2009-12-09 → 2009-12-12
    Earthquake magnitude 6.4 (mwc) in 0.642S 021.072W, depth 10 km at 091600Z dec 09
    Central Mid-atlantic Ridge
  20. USGS-USP000H48R2009-11-20 → 2009-11-23
    Earthquake magnitude 5.5 (mwc) in 0.180S 018.002W, depth 5 km at 201931Z nov 09
    Central Mid-atlantic Ridge
  21. USGS-USP000H45F2009-11-18 → 2009-11-21
    Earthquake magnitude 5.5 (mwc) in 53.965S 006.484E, depth 10 km at 180142Z nov 09
    Bouvet Island Region
  22. USGS-USP000H3ER2009-10-27 → 2009-10-30
    Earthquake magnitude 6.0 (mwc) in 59.955S 065.163W, depth 10 km at 270004Z oct 09
    Drake Passage
  23. USGS-USP000H08M2009-08-12 → 2009-08-15
    Earthquake magnitude 5.5 (mwb) in 57.660S 025.250W, depth 28 km at 121450Z aug 09
    South Sandwich Islands Region
  24. USGS-USP000GYP32009-06-27 → 2009-06-30
    Earthquake magnitude 5.6 (mwb) in 33.201S 015.935W, depth 13 km at 271545Z jun 09
    Southern Mid-atlantic Ridge
  25. USGS-USP000GY9C2009-06-16 → 2009-06-19
    Earthquake magnitude 6.1 (mwc) in 54.366S 005.871E, depth 10 km at 162005Z jun 09
    Bouvet Island Region
  26. USGS-USP000GVX12009-04-08 → 2009-04-11
    Earthquake magnitude 5.6 (mwc) in 58.096S 006.263W, depth 10 km at 080626Z apr 09
    Southern Mid-atlantic Ridge
  27. USGS-USP000GVRT2009-04-04 → 2009-04-07
    Earthquake magnitude 5.5 (mwc) in 55.976S 027.727W, depth 87 km at 041839Z apr 09
    South Sandwich Islands Region
  28. USGS-USP000GR1Z2008-12-20 → 2008-12-23
    Earthquake magnitude 5.8 (mwc) in 31.193S 013.338W, depth 4 km at 202105Z dec 08
    Southern Mid-atlantic Ridge
  29. USGS-USP000GP7Q2008-11-22 → 2008-11-25
    Earthquake magnitude 6.3 (mwc) in 1.230S 013.933W, depth 10 km at 221849Z nov 08
    North of Ascension Island
  30. USGS-USP000GNN82008-11-14 → 2008-11-17
    Earthquake magnitude 5.9 (mwc) in 53.794S 008.727E, depth 12 km at 140205Z nov 08
    Bouvet Island Region
  31. USGS-USP000GNKT2008-11-13 → 2008-11-16
    Earthquake magnitude 5.6 (mwc) in 55.961S 027.234W, depth 87 km at 131510Z nov 08
    South Sandwich Islands Region
  32. USGS-USP000GJ9S2008-10-04 → 2008-10-07
    Earthquake magnitude 5.7 (mwc) in 59.340S 025.903W, depth 35 km at 040756Z oct 08
    South Sandwich Islands Region
  33. USGS-USP000GGG12008-09-05 → 2008-09-08
    Earthquake magnitude 5.8 (mwc) in 1.171S 013.955W, depth 10 km at 051907Z sep 08
    North of Ascension Island
  34. USGS-USP000GFUY2008-08-28 → 2008-08-31
    Earthquake magnitude 6.3 (mwc) in 0.252S 017.358W, depth 12 km at 281522Z aug 08
    North of Ascension Island
  35. USGS-USP000GF022008-08-19 → 2008-08-22
    110 km ese of georgetown, saint helena
  36. USGS-USP000GEWB2008-08-17 → 2008-08-20
    Earthquake magnitude 5.6 (mwc) in 52.873S 004.453W, depth 10 km at 171539Z aug 08
    Southern Mid-atlantic Ridge
  37. USGS-USP000GEF72008-08-11 → 2008-08-14
    Earthquake magnitude 6.0 (mwc) in 1.020S 021.843W, depth 13 km at 112338Z aug 08
    Central Mid-atlantic Ridge
  38. USGS-USP000GDG32008-07-30 → 2008-08-02
    Earthquake magnitude 5.6 (mwb) in 59.644S 027.806W, depth 136 km at 302015Z jul 08
    South Sandwich Islands Region
  39. USGS-USP000GD9J2008-07-27 → 2008-07-30
    Earthquake magnitude 5.9 (mwc) in 0.253S 018.287W, depth 17 km at 272115Z jul 08
    Central Mid-atlantic Ridge
  40. USGS-USP000GC7H2008-07-15 → 2008-07-18
    Earthquake magnitude 5.7 (mwc) in 47.366S 012.170W, depth 10 km at 150507Z jul 08
    Southern Mid-atlantic Ridge
  41. USGS-USP000GB1G2008-07-01 → 2008-07-04
    Earthquake magnitude 5.6 (mwb) in 58.121S 021.882W, depth 10 km at 010154Z jul 08
    East of the South Sandwich Islands
  42. USGS-USP000GAZV2008-06-30 → 2008-07-03
    Earthquake magnitude 7.0 (mwc) in 58.227S 022.099W, depth 8 km at 300617Z jun 08
    South Sandwich Islands Region
  43. USGS-USP000G88Q2008-06-01 → 2008-06-04
    Earthquake magnitude 5.5 (mwc) in 54.816S 000.979E, depth 10 km at 010031Z jun 08
    Bouvet Island Region
  44. USGS-USP000G8472008-05-30 → 2008-06-02
    Earthquake magnitude 5.7 (mwc) in 54.744S 000.987E, depth 10 km at 301044Z may 08
    Bouvet Island Region
  45. USGS-USP000G6VD2008-05-15 → 2008-05-18
    Earthquake magnitude 5.9 (mwc) in 57.911S 025.483W, depth 35 km at 151423Z may 08
    South Sandwich Islands Region
  46. USGS-USP000G51J2008-04-28 → 2008-05-01
    Earthquake magnitude 6.1 (mwc) in 58.739S 024.714W, depth 35 km at 281557Z apr 08
    South Sandwich Islands Region
  47. USGS-USP000G4Z92008-04-27 → 2008-04-30
    Earthquake magnitude 5.6 (mwc) in 35.464S 016.597W, depth 10 km at 271435Z apr 08
    Southern Mid-atlantic Ridge
  48. USGS-USP000G4R42008-04-24 → 2008-04-27
    Earthquake magnitude 6.5 (mwc) in 1.182S 023.471W, depth 10 km at 241214Z apr 08
    Central Mid-atlantic Ridge
  49. USGS-USP000G3WG2008-04-14 → 2008-04-17
    Earthquake magnitude 6.0 (mwc) in 56.022S 028.035W, depth 140 km at 140945Z apr 08
    South Sandwich Islands Region
  50. USGS-USP000FZSD2008-02-23 → 2008-02-26
    Earthquake magnitude 6.8 (mwc) in 57.335S 023.433W, depth 14 km at 231557Z feb 08
    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 8 · seahazards