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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06
07
08
09
10
11
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14
15
16
17
18
19
20
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22
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26

By month (all years)

J
F
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A
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A
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D

Other hazards in the South Atlantic Ocean

Archive · 582 cancelled

  1. USGS-US10008EAK2017-04-04 → 2017-04-07
    Earthquake magnitude 5.6 (mww) in 55.616S 030.001W, depth 19 km at 041353Z apr 17
    South Sandwich Islands Region
  2. USGS-US100072872016-10-27 → 2016-10-30
    Earthquake magnitude 5.6 (mww) in 1.506S 015.591W, depth 10 km at 270103Z oct 16
    North of Ascension Island
  3. USGS-US10006RP92016-09-22 → 2016-09-25
    Earthquake magnitude 5.5 (mwb) in 59.472S 027.488W, depth 8 km at 221607Z sep 16
    South Sandwich Islands Region
  4. USGS-US10006JJ62016-09-02 → 2016-09-05
    Earthquake magnitude 5.5 (mwb) in 55.330S 030.918W, depth 8 km at 020157Z sep 16
    South Sandwich Islands Region
  5. USGS-US20006UY62016-08-29 → 2016-09-01
    Earthquake magnitude 7.1 (mww) in 0.046S 017.826W, depth 10 km at 290429Z aug 16
    North of Ascension Island
  6. USGS-US10006FIK2016-08-21 → 2016-08-24
    Earthquake magnitude 6.1 (mww) in 55.313S 031.751W, depth 12 km at 210345Z aug 16
    South Georgia Island Region
  7. USGS-US10006F9K2016-08-19 → 2016-08-22
    Earthquake magnitude 5.5 (mwb) in 55.201S 032.113W, depth 7 km at 192037Z aug 16
    South Georgia Island Region
  8. USGS-US10006F6X2016-08-19 → 2016-08-22
    Earthquake magnitude 5.8 (mww) in 55.215S 032.066W, depth 3 km at 191733Z aug 16
    South Georgia Island Region
  9. USGS-US10006GI22016-08-19 → 2016-08-22
    Earthquake magnitude 5.7 (mb) in 55.335S 030.771W, depth 10 km at 190736Z aug 16
    South Sandwich Islands Region
  10. USGS-US10006EXL2016-08-19 → 2016-08-22
    Earthquake magnitude 7.4 (mww) in 55.285S 031.877W, depth 10 km at 190732Z aug 16
    South Georgia Island Region
  11. USGS-US100069EE2016-08-02 → 2016-08-05
    Earthquake magnitude 5.6 (mww) in 58.750S 025.549W, depth 34 km at 020732Z aug 16
    South Sandwich Islands Region
  12. USGS-US100068YV2016-07-31 → 2016-08-03
    Earthquake magnitude 5.9 (mww) in 56.256S 027.537W, depth 99 km at 311133Z jul 16
    South Sandwich Islands Region
  13. USGS-US20006HNX2016-07-26 → 2016-07-29
    Earthquake magnitude 5.9 (mwb) in 0.271S 018.643W, depth 10 km at 260549Z jul 16
    Central Mid-atlantic Ridge
  14. USGS-US200063GD2016-06-10 → 2016-06-13
    103 km ene of georgetown, saint helena
  15. USGS-US20005YSU2016-05-28 → 2016-05-31
    Earthquake magnitude 7.2 (mww) in 56.241S 026.935W, depth 78 km at 280946Z may 16
    South Sandwich Islands Region
  16. USGS-US20005LDK2016-04-24 → 2016-04-27
    Earthquake magnitude 5.5 (mww) in 59.307S 027.027W, depth 10 km at 240837Z apr 16
    South Sandwich Islands Region
  17. USGS-US20005JQC2016-04-19 → 2016-04-22
    Earthquake magnitude 6.2 (mww) in 55.728S 027.231W, depth 14 km at 190525Z apr 16
    South Sandwich Islands Region
  18. USGS-US20005CXT2016-03-28 → 2016-03-31
    Earthquake magnitude 5.5 (mwc) in 56.254S 027.641W, depth 30 km at 281907Z mar 16
    South Sandwich Islands Region
  19. USGS-US10004XMH2016-03-14 → 2016-03-17
    Earthquake magnitude 5.6 (mww) in 52.614S 018.798E, depth 10 km at 142325Z mar 16
    Southwest of Africa
  20. USGS-US10004XBL2016-03-14 → 2016-03-17
    Earthquake magnitude 5.6 (mww) in 56.428S 027.009W, depth 84 km at 140726Z mar 16
    South Sandwich Islands Region
  21. USGS-US10004QP22016-02-18 → 2016-02-21
    Earthquake magnitude 5.6 (mww) in 56.255S 027.566W, depth 99 km at 180107Z feb 16
    South Sandwich Islands Region
  22. USGS-US1000493B2015-12-23 → 2015-12-26
    Earthquake magnitude 5.8 (mww) in 54.176S 001.494W, depth 10 km at 231655Z dec 15
    Bouvet Island Region
  23. USGS-US20004G402015-12-10 → 2015-12-13
    Earthquake magnitude 5.7 (mww) in 58.880S 023.906W, depth 10 km at 101205Z dec 15
    South Sandwich Islands Region
  24. USGS-US100040UV2015-11-24 → 2015-11-27
    Earthquake magnitude 5.5 (mwb) in 0.098S 017.834W, depth 10 km at 242045Z nov 15
    North of Ascension Island
  25. USGS-US10003QVC2015-10-23 → 2015-10-26
    Earthquake magnitude 6.2 (mww) in 54.226S 006.165E, depth 11 km at 230140Z oct 15
    Bouvet Island Region
  26. USGS-US10003PZW2015-10-20 → 2015-10-23
    Earthquake magnitude 5.6 (mww) in 57.433S 065.887W, depth 9 km at 202033Z oct 15
    Drake Passage
  27. USGS-US10003J3J2015-09-30 → 2015-10-03
    Earthquake magnitude 5.7 (mww) in 56.195S 027.715W, depth 101 km at 301606Z sep 15
    South Sandwich Islands Region
  28. USGS-US100035082015-08-26 → 2015-08-29
    Earthquake magnitude 5.8 (mww) in 57.500S 025.875W, depth 32 km at 261351Z aug 15
    South Sandwich Islands Region
  29. USGS-US20002ZFA2015-07-23 → 2015-07-26
    Earthquake magnitude 5.5 (mwb) in 0.694S 021.178W, depth 9 km at 230356Z jul 15
    Central Mid-atlantic Ridge
  30. USGS-US10002KFG2015-06-20 → 2015-06-23
    Earthquake magnitude 5.7 (mww) in 59.629S 026.503W, depth 50 km at 200532Z jun 15
    South Sandwich Islands Region
  31. USGS-US20002QN72015-06-17 → 2015-06-20
    Earthquake magnitude 7.0 (mww) in 35.364S 017.160W, depth 10 km at 171251Z jun 15
    Southern Mid-atlantic Ridge
  32. USGS-US10002CCF2015-05-26 → 2015-05-29
    Earthquake magnitude 5.7 (mwc) in 58.736S 025.214W, depth 35 km at 262341Z may 15
    South Sandwich Islands Region
  33. USGS-US10002BYB2015-05-24 → 2015-05-27
    Earthquake magnitude 5.8 (mww) in 59.653S 026.455W, depth 34 km at 242106Z may 15
    South Sandwich Islands Region
  34. USGS-US10002BVX2015-05-24 → 2015-05-27
    Earthquake magnitude 6.3 (mww) in 16.855S 014.171W, depth 10 km at 240453Z may 15
    Southern Mid-atlantic Ridge
  35. USGS-USB000TPUW2015-02-16 → 2015-02-19
    Earthquake magnitude 6.2 (mww) in 55.520S 028.259W, depth 13 km at 162200Z feb 15
    South Sandwich Islands Region
  36. USGS-USC000TKSD2015-02-01 → 2015-02-04
    Earthquake magnitude 5.6 (mwc) in 49.318S 008.120W, depth 10 km at 012002Z feb 15
    Southern Mid-atlantic Ridge
  37. USGS-USC000TAKC2014-12-29 → 2015-01-01
    Earthquake magnitude 5.6 (mww) in 56.659S 024.851W, depth 19 km at 291741Z dec 14
    South Sandwich Islands Region
  38. USGS-USC000T7ZA2014-12-18 → 2014-12-21
    Earthquake magnitude 5.5 (mww) in 56.628S 025.370W, depth 10 km at 182010Z dec 14
    South Sandwich Islands Region
  39. USGS-USC000T5JN2014-12-11 → 2014-12-14
    Earthquake magnitude 5.5 (mwb) in 56.751S 025.425W, depth 10 km at 111353Z dec 14
    South Sandwich Islands Region
  40. USGS-USB000SEYA2014-09-22 → 2014-09-25
    Earthquake magnitude 5.7 (mww) in 56.023S 027.779W, depth 109 km at 221601Z sep 14
    South Sandwich Islands Region
  41. USGS-USB000S5W92014-08-24 → 2014-08-27
    Earthquake magnitude 5.5 (mb) in 55.323S 028.515W, depth 10 km at 242021Z aug 14
    South Sandwich Islands Region
  42. USGS-USB000S4RB2014-08-20 → 2014-08-23
    Earthquake magnitude 5.5 (mwb) in 59.106S 017.116W, depth 10 km at 202318Z aug 14
    East of the South Sandwich Islands
  43. USGS-USB000RZGN2014-08-02 → 2014-08-05
    Earthquake magnitude 5.6 (mwb) in 55.428S 028.309W, depth 7 km at 021402Z aug 14
    South Sandwich Islands Region
  44. USGS-USB000RSF02014-07-12 → 2014-07-15
    Earthquake magnitude 5.6 (mww) in 55.341S 027.919W, depth 10 km at 121820Z jul 14
    South Sandwich Islands Region
  45. USGS-USB000RSEJ2014-07-12 → 2014-07-15
    Earthquake magnitude 5.6 (mww) in 55.416S 027.971W, depth 6 km at 121749Z jul 14
    South Sandwich Islands Region
  46. USGS-USC000RNJW2014-06-29 → 2014-07-02
    Earthquake magnitude 6.0 (mwb) in 55.358S 028.108W, depth 10 km at 291432Z jun 14
    South Sandwich Islands Region
  47. USGS-USC000RNJU2014-06-29 → 2014-07-02
    Earthquake magnitude 5.8 (mwb) in 55.407S 028.106W, depth 10 km at 291420Z jun 14
    South Sandwich Islands Region
  48. USGS-USC000RNGJ2014-06-29 → 2014-07-02
    Earthquake magnitude 6.9 (mww) in 55.470S 028.367W, depth 8 km at 290752Z jun 14
    South Sandwich Islands Region
  49. USGS-USC000RF9I2014-06-13 → 2014-06-16
    Earthquake magnitude 5.8 (mww) in 46.029S 013.884W, depth 6 km at 131930Z jun 14
    Southern Mid-atlantic Ridge
  50. USGS-USB000QZB92014-05-22 → 2014-05-25
    Earthquake magnitude 5.5 (mwb) in 55.397S 028.277W, depth 7 km at 220837Z may 14
    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 6 · seahazards