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-US7000GL7S2022-02-16 → 2022-02-19
    Earthquake magnitude 5.5 (mww) in 58.340S 025.527W, depth 31 km at 160539Z feb 22
    South Sandwich Islands Region
  2. USGS-US7000GKCM2022-02-12 → 2022-02-15
    Earthquake magnitude 5.5 (mww) in 0.491S 019.986W, depth 10 km at 122048Z feb 22
    Central Mid-atlantic Ridge
  3. USGS-US7000GJME2022-02-10 → 2022-02-13
    Earthquake magnitude 5.5 (mww) in 10.332S 013.128W, depth 10 km at 101027Z feb 22
    Ascension Island Region
  4. USGS-US7000GJ2G2022-02-08 → 2022-02-11
    Earthquake magnitude 6.2 (mww) in 0.417S 019.891W, depth 10 km at 081159Z feb 22
    Central Mid-atlantic Ridge
  5. USGS-US7000GERY2022-01-25 → 2022-01-28
    Earthquake magnitude 6.0 (mww) in 55.370S 028.784W, depth 11 km at 250124Z jan 22
    South Sandwich Islands Region
  6. USGS-US7000GDFW2022-01-20 → 2022-01-23
    Earthquake magnitude 5.9 (mww) in 58.889S 023.919W, depth 8 km at 200652Z jan 22
    South Sandwich Islands Region
  7. USGS-US7000G7W52021-12-30 → 2022-01-02
    Earthquake magnitude 5.7 (mww) in 55.889S 028.083W, depth 41 km at 300458Z dec 21
    South Sandwich Islands Region
  8. USGS-US6000GEEA2021-12-22 → 2021-12-25
    Earthquake magnitude 5.9 (mww) in 57.782S 025.340W, depth 35 km at 220551Z dec 21
    South Sandwich Islands Region
  9. USGS-US6000GDQC2021-12-20 → 2021-12-23
    Earthquake magnitude 5.9 (mww) in 56.840S 024.014W, depth 10 km at 200339Z dec 21
    South Sandwich Islands Region
  10. USGS-US6000GA3A2021-12-07 → 2021-12-10
    Earthquake magnitude 5.8 (mww) in 57.464S 025.747W, depth 31 km at 071555Z dec 21
    South Sandwich Islands Region
  11. USGS-US6000G9BB2021-12-05 → 2021-12-08
    Earthquake magnitude 5.6 (mww) in 59.830S 029.439W, depth 10 km at 051826Z dec 21
    South Sandwich Islands Region
  12. USGS-US6000G90R2021-12-04 → 2021-12-07
    Earthquake magnitude 5.7 (mww) in 59.732S 028.013W, depth 10 km at 041427Z dec 21
    South Sandwich Islands Region
  13. USGS-US7000FTTY2021-11-13 → 2021-11-16
    Earthquake magnitude 5.5 (mww) in 26.453S 013.688W, depth 10 km at 131410Z nov 21
    Southern Mid-atlantic Ridge
  14. USGS-US7000FTDY2021-11-12 → 2021-11-15
    Earthquake magnitude 5.8 (mww) in 26.542S 013.677W, depth 10 km at 120034Z nov 21
    Southern Mid-atlantic Ridge
  15. USGS-US7000FQCG2021-11-01 → 2021-11-04
    Earthquake magnitude 6.0 (mww) in 58.028S 025.268W, depth 22 km at 010002Z nov 21
    South Sandwich Islands Region
  16. USGS-US6000FXJF2021-10-26 → 2021-10-29
    Earthquake magnitude 5.9 (mww) in 58.337S 014.793W, depth 10 km at 260548Z oct 21
    East of the South Sandwich Islands
  17. USGS-US7000FA9J2021-09-11 → 2021-09-14
    Earthquake magnitude 5.5 (mww) in 59.606S 026.383W, depth 41 km at 110923Z sep 21
    South Sandwich Islands Region
  18. USGS-US7000F8GZ2021-09-06 → 2021-09-09
    Earthquake magnitude 5.6 (mww) in 58.781S 025.224W, depth 28 km at 060819Z sep 21
    South Sandwich Islands Region
  19. USGS-US7000F8752021-09-05 → 2021-09-08
    Earthquake magnitude 5.6 (mww) in 58.725S 025.180W, depth 27 km at 050959Z sep 21
    South Sandwich Islands Region
  20. USGS-US7000F85Q2021-09-05 → 2021-09-08
    Earthquake magnitude 5.5 (mww) in 56.767S 025.662W, depth 20 km at 050526Z sep 21
    South Sandwich Islands Region
  21. USGS-US7000F7DP2021-09-03 → 2021-09-06
    Earthquake magnitude 5.6 (mww) in 59.925S 026.753W, depth 7 km at 030749Z sep 21
    South Sandwich Islands Region
  22. USGS-US7000F7A52021-09-03 → 2021-09-06
    Earthquake magnitude 5.5 (mww) in 58.815S 025.727W, depth 35 km at 030006Z sep 21
    South Sandwich Islands Region
  23. USGS-US7000F6Q82021-09-01 → 2021-09-04
    Earthquake magnitude 5.7 (mww) in 1.242S 024.148W, depth 10 km at 011350Z sep 21
    Central Mid-atlantic Ridge
  24. USGS-US7000F6L92021-09-01 → 2021-09-04
    Earthquake magnitude 5.6 (mww) in 59.079S 025.567W, depth 27 km at 010901Z sep 21
    South Sandwich Islands Region
  25. USGS-US7000F67H2021-08-31 → 2021-09-03
    Earthquake magnitude 5.6 (mww) in 57.018S 025.134W, depth 15 km at 311424Z aug 21
    South Sandwich Islands Region
  26. USGS-US7000F5IZ2021-08-29 → 2021-09-01
    Earthquake magnitude 5.5 (mww) in 58.103S 023.520W, depth 10 km at 292332Z aug 21
    South Sandwich Islands Region
  27. USGS-US7000F4032021-08-26 → 2021-08-29
    Earthquake magnitude 5.8 (mww) in 58.799S 025.437W, depth 30 km at 260320Z aug 21
    South Sandwich Islands Region
  28. USGS-US6000F9Q32021-08-22 → 2021-08-25
    Earthquake magnitude 5.7 (mww) in 58.276S 025.062W, depth 21 km at 221521Z aug 21
    South Sandwich Islands Region
  29. USGS-US6000F8432021-08-18 → 2021-08-21
    Earthquake magnitude 6.0 (mww) in 59.634S 026.348W, depth 28 km at 182149Z aug 21
    South Sandwich Islands Region
  30. USGS-US6000F7SK2021-08-18 → 2021-08-21
    Earthquake magnitude 5.8 (mww) in 59.630S 026.387W, depth 31 km at 180248Z aug 21
    South Sandwich Islands Region
  31. USGS-US6000F7NX2021-08-17 → 2021-08-20
    Earthquake magnitude 5.5 (mww) in 59.632S 026.183W, depth 42 km at 172006Z aug 21
    South Sandwich Islands Region
  32. USGS-US6000F7KS2021-08-17 → 2021-08-20
    Earthquake magnitude 6.1 (mww) in 58.026S 025.416W, depth 33 km at 171753Z aug 21
    South Sandwich Islands Region
  33. USGS-US6000F7ES2021-08-17 → 2021-08-20
    Earthquake magnitude 5.6 (mww) in 58.034S 023.898W, depth 10 km at 170310Z aug 21
    South Sandwich Islands Region
  34. USGS-US6000F7CR2021-08-16 → 2021-08-19
    Earthquake magnitude 5.5 (mww) in 59.540S 026.302W, depth 41 km at 162337Z aug 21
    South Sandwich Islands Region
  35. USGS-US6000F6WT2021-08-16 → 2021-08-19
    Earthquake magnitude 6.9 (mww) in 58.369S 023.355W, depth 17 km at 161110Z aug 21
    South Sandwich Islands Region
  36. USGS-US6000F6TS2021-08-16 → 2021-08-19
    Earthquake magnitude 5.7 (mww) in 56.902S 025.671W, depth 16 km at 160546Z aug 21
    South Sandwich Islands Region
  37. USGS-US6000F6BZ2021-08-14 → 2021-08-17
    Earthquake magnitude 5.5 (mww) in 56.522S 025.684W, depth 16 km at 142142Z aug 21
    South Sandwich Islands Region
  38. USGS-US6000F74G2021-08-13 → 2021-08-16
    Earthquake magnitude 5.5 (mww) in 17.896S 013.408W, depth 10 km at 132015Z aug 21
    Southern Mid-atlantic Ridge
  39. USGS-US6000F5U92021-08-13 → 2021-08-16
    Earthquake magnitude 5.5 (mww) in 57.817S 023.987W, depth 10 km at 132004Z aug 21
    South Sandwich Islands Region
  40. USGS-US6000F5I92021-08-13 → 2021-08-16
    Earthquake magnitude 5.7 (mww) in 57.266S 025.507W, depth 19 km at 131145Z aug 21
    South Sandwich Islands Region
  41. USGS-US6000F5BF2021-08-13 → 2021-08-16
    Earthquake magnitude 5.6 (mb) in 59.475S 024.409W, depth 10 km at 130614Z aug 21
    South Sandwich Islands Region
  42. USGS-US6000F59Z2021-08-13 → 2021-08-16
    Earthquake magnitude 5.5 (mww) in 57.832S 024.892W, depth 21 km at 130524Z aug 21
    South Sandwich Islands Region
  43. USGS-US6000F56J2021-08-13 → 2021-08-16
    Earthquake magnitude 5.8 (mb) in 58.019S 025.357W, depth 35 km at 130343Z aug 21
    South Sandwich Islands Region
  44. USGS-US6000F4YZ2021-08-12 → 2021-08-15
    Earthquake magnitude 5.5 (mb) in 58.374S 024.323W, depth 10 km at 122350Z aug 21
    South Sandwich Islands Region
  45. USGS-US6000F4Y02021-08-12 → 2021-08-15
    Earthquake magnitude 5.5 (mb) in 58.764S 025.145W, depth 36 km at 122324Z aug 21
    South Sandwich Islands Region
  46. USGS-US6000F4VE2021-08-12 → 2021-08-15
    Earthquake magnitude 5.6 (mb) in 57.985S 025.157W, depth 35 km at 122208Z aug 21
    South Sandwich Islands Region
  47. USGS-US6000F4TU2021-08-12 → 2021-08-15
    Earthquake magnitude 5.6 (mb) in 59.835S 026.724W, depth 68 km at 122107Z aug 21
    South Sandwich Islands Region
  48. USGS-US6000F4QL2021-08-12 → 2021-08-15
    Earthquake magnitude 5.8 (mb) in 58.542S 025.177W, depth 45 km at 122006Z aug 21
    South Sandwich Islands Region
  49. USGS-US6000F4P92021-08-12 → 2021-08-15
    Earthquake magnitude 5.9 (mb) in 59.872S 026.453W, depth 40 km at 121944Z aug 21
    South Sandwich Islands Region
  50. USGS-US6000F4PG2021-08-12 → 2021-08-15
    Earthquake magnitude 6.0 (mb) in 59.844S 026.451W, depth 35 km at 121943Z aug 21
    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 3 · seahazards