Arctic Ocean
IHO sea area 17 · -180° to 180° E, 71° to 90° N
- in force
- 1
- last 12 months
- 1
- archive messages
- 260
- categories
- 13
What the archive shows
260 messages are recorded since 1991-09-16 for the Arctic 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.
Missiles accounts for 101 of 260 recorded messages (39%), 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 2024-12-17 08:58ZFour scientific moorings established in Beaufort and Chukchi Seas off Alaska at various positions and depths.
In force now · 1
Longest in force
By year
91
97
99
02
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
| Missiles | 101 | 39% |
| Surveys | 81 | 31% |
| Quakes | 27 | 10% |
| Exercises | 18 | 7% |
| Cable ops | 13 | 5% |
| Other | 6 | 2% |
| Icebergs | 3 | 1% |
| Nav aids | 3 | 1% |
| Restricted | 2 | 1% |
| Wrecks | 2 | 1% |
| Towing | 2 | 1% |
| Debris | 1 | 0% |
| Spills | 1 | 0% |
Archive · 259 cancelled
- HYDROARC 8/10 · Surveys2010-07-02 → 2012-12-16Scientific mooring in 86-25.80N 046-28.32W
- HYDROPAC 2325/09 · Exercises2009-12-11 → 2009-12-18Hazardous operations 1126Z to 1829Z daily 15 dec thru 15 jan 10 in area bound by 88-09N 173-13W, 88-50N…
- HYDROPAC 2291/09 · Exercises2009-12-06 → 2009-12-11Hazardous operations 1126Z to 1829Z daily 09 dec thru 09 jan 10 in area bound by 88-09N 173-13W, 88-50N…
- USGS-USP000H2G5 · Quakes2009-10-07 → 2009-10-10Earthquake magnitude 5.8 (mwc) in 81.572N 119.533E, depth 8 km at 072052Z oct 09
- HYDROPAC 1209/09 · Exercises2009-07-01 → 2009-07-09Hazardous operations 0100Z to 0300Z daily 06 thru 09 jul within 27 miles of 78-16N 163-55E
- USGS-USP000GX8E · Quakes2009-05-17 → 2009-05-20Earthquake magnitude 5.5 (mwc) in 82.517N 008.628W, depth 6 km at 171924Z may 09
- HYDROPAC 199/09 · Exercises2009-01-24 → 2009-02-01Hazardous operations 1300Z to 1500Z daily 29 jan thru 01 feb in area bound by 74-00N 171-00E, 75-00N…
- USGS-USP000GNWZ · Quakes2008-11-17 → 2008-11-20Earthquake magnitude 5.7 (mwc) in 79.648N 116.056W, depth 7 km at 171255Z nov 08
- USGS-USP000GJMM · Quakes2008-10-07 → 2008-10-10Earthquake magnitude 5.7 (mwc) in 79.817N 115.448W, depth 10 km at 071000Z oct 08
- HYDROARC 13/08 · Surveys2008-09-06 → 2008-11-01Scientific moorings established thru oct: a. HCE-07 in 73-09.567N 162-19.786W
- HYDROARC 4/08 · Surveys2008-08-20 → 2009-09-11Scientific moorings established in: a. 71-40.0N 167-59.1W
- USGS-USP000GEKH · Quakes2008-08-13 → 2008-08-16Earthquake magnitude 5.7 (mwc) in 83.550N 114.516E, depth 10 km at 131830Z aug 08
- HYDROARC 3/08 · Restricted2008-05-20 → 2008-06-01Nga chart 38023 (4TH ed)
- HYDROPAC 977/08 · Restricted2008-05-20 → 2008-06-01Nga chart 38023 (4TH ed)
- HYDROARC 2/08 · Surveys2008-04-23 → 2011-07-02Scientific mooring established in 89-31.527N 084-22.488E
- HYDROARC 1/08 · Surveys2008-01-18 → 2011-05-21Scientific moorings established in: a. 72-47.908N 158-23.880W
- HYDROARC 3/07 · Other2007-09-04 → 2010-08-08Underwater seamount, least depth 925 meters, reported in 78-36.91N 158-21.35W
- HYDROARC 2/07 · Other2007-08-31 → 2007-09-04Underwater seamount, least depth 900 feet, reported in 78-36.91N 158-21.35W
- HYDROARC 1/07 · Surveys2007-07-13 → 2010-08-13Scientific moorings established in: 1. 72-10.57N 156-33.18W
- HYDROARC 38/06 · Surveys2006-10-21 → 2010-07-02Scientific mooring, top float 50 meters established in 75-00.198N 149-52.295W
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.