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-US7000Q9B5 · Quakes2025-06-28 → 2025-07-01Earthquake magnitude 6.6 (mww) in 60.979S 038.967W, depth 10 km at 280832Z jun 25
- USGS-US6000QJRQ · Quakes2025-06-12 → 2025-06-15Earthquake magnitude 5.5 (mww) in 63.208S 164.423W, depth 10 km at 120614Z jun 25
- USGS-US6000QJR3 · Quakes2025-06-12 → 2025-06-15Earthquake magnitude 5.7 (mww) in 63.241S 163.758W, depth 10 km at 120458Z jun 25
- USGS-US7000PY39 · Quakes2025-05-08 → 2025-05-11Earthquake magnitude 5.7 (mww) in 60.547S 160.025E, depth 10 km at 082201Z may 25
- USGS-US6000Q3L2 · Quakes2025-04-03 → 2025-04-06Earthquake magnitude 5.5 (mww) in 65.172S 179.337E, depth 10 km at 030418Z apr 25
- USGS-US6000PZXI · Quakes2025-03-20 → 2025-03-23Earthquake magnitude 5.7 (mww) in 60.429S 027.255W, depth 24 km at 200630Z mar 25
- USGS-US6000PGZQ · Quakes2025-01-02 → 2025-01-05Earthquake magnitude 5.5 (mww) in 62.334S 155.705E, depth 10 km at 020254Z jan 25
- USGS-US7000NRYG · Quakes2024-11-15 → 2024-11-18Earthquake magnitude 5.5 (mww) in 61.286S 153.996E, depth 10 km at 151041Z nov 24
- USGS-US6000NFPD · Quakes2024-07-25 → 2024-07-28Earthquake magnitude 5.6 (mww) in 60.796S 025.370W, depth 10 km at 251505Z jul 24
- USGS-US7000MSQT · Quakes2024-06-16 → 2024-06-19Earthquake magnitude 6.0 (mww) in 60.950S 154.335E, depth 8 km at 160027Z jun 24
- HYDROLANT 984/24 · Icebergs2024-05-10 → 2024-05-11Icebergs reported in: a. A74A, 70-17.40S 056-33.00W
- HYDROLANT 976/24 · Icebergs2024-05-09 → 2024-05-10Icebergs reported in: a. A74A, 70-17.40S 056-33.00W
- HYDROLANT 972/24 · Icebergs2024-05-08 → 2024-05-09Icebergs reported in: a. A74A, 70-17.40S 056-33.00W
- HYDROLANT 966/24 · Icebergs2024-05-07 → 2024-05-08Icebergs reported in: a. A74A, 70-17.40S 056-33.00W
- HYDROLANT 960/24 · Icebergs2024-05-06 → 2024-05-07Icebergs reported in: a. A74A, 70-17.40S 056-33.00W
- HYDROLANT 955/24 · Icebergs2024-05-05 → 2024-05-06Icebergs reported in: a. A74A, 70-17.40S 056-33.00W
- HYDROLANT 952/24 · Icebergs2024-05-04 → 2024-05-051, icebergs reported in: a. A23A, 59-04.80S 044-45.60W
- HYDROLANT 944/24 · Icebergs2024-05-03 → 2024-05-04Icebergs reported in: a. A23A, 59-04.80S 044-45.60W
- HYDROLANT 940/24 · Icebergs2024-05-02 → 2024-05-03Icebergs reported in: a. A23A, 59-04.80S 044-45.60W
- HYDROLANT 930/24 · Icebergs2024-05-01 → 2024-05-02Icebergs reported in: a. A23A, 59-18.60S 044-46.20W
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.