Southern Ocean
IHO sea area 67 · -180° to 180° E, -86° to -60° N
- in force
- 2
- last 12 months
- 40
- archive messages
- 3,461
- categories
- 13
What the archive shows
3,461 messages are recorded since 1989-01-28 for the Southern Ocean. The selection uses the IHO sea area; a message may describe an exercise, equipment outage or continuing operation as well as a hazard report.
Icebergs accounts for 3,013 of 3,461 recorded messages (87%), the largest category group in this selection.
The NGA historical archive froze in 2024-05; live collection began 2026-08-17. Counts around that gap are incomplete, and changes in reporting volume do not establish changes in incident frequency.
- An older warning still listed in force · issued 2026-06-30 13:27ZIcebergs are reported in South Atlantic, South Pacific, and Antarctica at positions A81, A84, A85, D33A, D33C; cancel message 011327Z July 26.
In force now · 2
- HYDROLANT 1959/26 · Icebergs2026-10-02Icebergs are reported in Scotia Sea, South Atlantic, South Pacific, and Antarctica at A84, A85, D33A and D33C; the warning cancels 03 October 2026 0413.
- HYDROLANT 1279/26 · Icebergs2026-06-30Icebergs are reported in South Atlantic, South Pacific, and Antarctica at positions A81, A84, A85, D33A, D33C; cancel message 011327Z July 26.
Longest in force
- HYDROLANT 1279/26 · Icebergs2026-06-30Icebergs are reported in South Atlantic, South Pacific, and Antarctica at positions A81, A84, A85, D33A, D33C; cancel message 011327Z July 26.
- HYDROLANT 1959/26 · Icebergs2026-10-02Icebergs are reported in Scotia Sea, South Atlantic, South Pacific, and Antarctica at A84, A85, D33A and D33C; the warning cancels 03 October 2026 0413.
By year
89
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
By category · available archive
| Icebergs | 3,013 | 87% |
| Quakes | 242 | 7% |
| Incidents | 68 | 2% |
| Surveys | 42 | 1% |
| Missiles | 39 | 1% |
| Nav aids | 24 | 1% |
| Wrecks | 12 | 0% |
| Other | 10 | 0% |
| Derelicts | 4 | 0% |
| Spills | 3 | 0% |
| Exercises | 2 | 0% |
| Debris | 1 | 0% |
| Containers | 1 | 0% |
Archive · 3,459 cancelled
- USGS-US6000TMRW · Quakes2026-08-22 → 2026-08-25Earthquake magnitude 6.2 (mww) in 60.316S 047.559W, depth 10 km at 220822Z aug 26
- USGS-US6000TMRN · Quakes2026-08-22 → 2026-08-25Earthquake magnitude 5.7 (mww) in 60.288S 047.266W, depth 10 km at 220740Z aug 26
- HYDROLANT 1637/26 · Icebergs2026-08-21 → 2026-08-19Icebergs reported in Scotia Sea, South Atlantic, South Pacific, and Antarctica at four positions; this message cancels August 26.
- HYDROLANT 1623/26 · Icebergs2026-08-20 → 2026-08-20Icebergs reported in Scotia Sea, South Atlantic, South Pacific, Antarctica at positions A84, A85, D33A, D33C. Cancel message 210411Z Aug 26.
- HYDROLANT 1609/26 · Icebergs2026-08-19 → 2026-08-19Icebergs A84, A85, D33A, D33C reported in Scotia Sea, South Atlantic, South Pacific, Antarctica; message cancels August 26, 2026.
- HYDROLANT 1570/26 · Icebergs2026-08-14 → 2026-08-21Icebergs reported in the Scotia Sea and Antarctica at several coordinates; message cancels August 15, 2026, 06:32 UTC.
- USGS-US6000TK74 · Quakes2026-08-12 → 2026-08-15Earthquake magnitude 6.0 (mww) in 60.246S 029.030W, depth 10 km at 121147Z aug 26
- HYDROPAC 2289/26 · Missiles2026-08-10 → 2026-08-28Space debris hazard operations daily 13 to 26 August, 2100Z to 1800Z, in the South Pacific.
- USGS-US6000TGUD · Quakes2026-07-29 → 2026-08-01Earthquake magnitude 5.5 (mww) in 65.088S 179.367W, depth 10 km at 292208Z jul 26
- USGS-US7000T1NG · Quakes2026-07-18 → 2026-07-21Earthquake magnitude 5.5 (mww) in 60.769S 051.083W, depth 10 km at 181950Z jul 26
- USGS-US7000SZ2B · Quakes2026-07-08 → 2026-07-11Earthquake magnitude 5.6 (mww) in 61.811S 154.864E, depth 10 km at 081907Z jul 26
- USGS-US7000SQZX · Quakes2026-06-05 → 2026-06-08Earthquake magnitude 5.6 (mww) in 61.732S 161.373E, depth 10 km at 052058Z jun 26
- USGS-US6000SRTD · Quakes2026-04-21 → 2026-04-24Earthquake magnitude 5.7 (mww) in 62.306S 165.527E, depth 10 km at 211030Z apr 26
- USGS-US6000SHLP · Quakes2026-03-20 → 2026-03-23Earthquake magnitude 6.5 (mww) in 61.188S 056.403W, depth 21 km at 200022Z mar 26
- USGS-US6000SAMT · Quakes2026-02-21 → 2026-02-24Earthquake magnitude 5.6 (mww) in 63.137S 169.543E, depth 10 km at 211701Z feb 26
- USGS-US6000RW5U · Quakes2025-12-20 → 2025-12-23Earthquake magnitude 5.6 (mww) in 63.809S 172.771E, depth 10 km at 200657Z dec 25
- USGS-US6000RGGE · Quakes2025-10-10 → 2025-10-13Earthquake magnitude 5.7 (mb) in 60.066S 062.362W, depth 10 km at 102128Z oct 25
- USGS-US6000RGF4 · Quakes2025-10-10 → 2025-10-13Earthquake magnitude 7.6 (mww) in 60.188S 061.816W, depth 6 km at 102029Z oct 25
- USGS-US6000R2XQ · Quakes2025-08-22 → 2025-08-252025 southern drake passage earthquake
- USGS-US6000QVGW · Quakes2025-07-27 → 2025-07-30Earthquake magnitude 5.6 (mww) in 60.088S 018.745W, depth 10 km at 270930Z jul 25
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.