Eastern China Sea
IHO sea area 50 · 118° to 131° E, 24° to 33° N
- in force
- 1
- last 12 months
- 7
- archive messages
- 545
- categories
- 15
What the archive shows
545 messages are recorded since 1977-02-05 for the Eastern China Sea. The selection uses the IHO sea area; a message may describe an exercise, equipment outage or continuing operation as well as a hazard report.
Cable ops accounts for 220 of 545 recorded messages (40%), 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 2023-07-28 08:00ZA large buoy exists in the East China Sea at 31 degrees north, 124 degrees east.
In force now · 1
Longest in force
By year
77
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
| Cable ops | 220 | 40% |
| Incidents | 129 | 24% |
| Quakes | 100 | 18% |
| Ordnance | 24 | 4% |
| Nav aids | 14 | 3% |
| Surveys | 11 | 2% |
| Derelicts | 8 | 1% |
| Exercises | 8 | 1% |
| Missiles | 7 | 1% |
| Other | 6 | 1% |
| Containers | 6 | 1% |
| Wrecks | 4 | 1% |
| Debris | 3 | 1% |
| Volcanic | 3 | 1% |
| Spills | 2 | 0% |
Archive · 544 cancelled
- HYDROPAC 1797/16 · Nav aids2016-06-15 → 2016-06-15NAVTEX station naha 26-05.5N 127-40.1E off air
- HYDROPAC 1664/16 · Nav aids2016-06-04 → 2017-01-28Tung-yin tao light 26-22.0N 120-30.6E changed to: fl (2) w 14 sec 25 miles
- USGS-US20005ZAY · Quakes2016-05-31 → 2016-06-03Earthquake magnitude 6.4 (mww) in 25.561N 122.546E, depth 246 km at 310523Z may 16
- HYDROPAC 1586/16 · Surveys2016-05-29 → 2016-06-10Survey operations in progress until 09 jun by M/V polaris towing equipment in area bound by 24-59N 122-27E,…
- USGS-US20005YDI · Quakes2016-05-27 → 2016-05-30116 km sw of naze, japan
- USGS-US20005JGZ · Quakes2016-04-18 → 2016-04-218 km nne of aso, japan
- USGS-US20005INZ · Quakes2016-04-15 → 2016-04-1810 km ne of aso, japan
- USGS-US20005IJA · Quakes2016-04-15 → 2016-04-186 km s of kikuchi, japan
- USGS-US20005IIS · Quakes2016-04-15 → 2016-04-186 km ese of kumamoto, japan
- USGS-US20005I1A · Quakes2016-04-14 → 2016-04-175 km ene of uto, japan
- USGS-US20005HZN · Quakes2016-04-14 → 2016-04-172 km sse of kumamoto, japan
- HYDROPAC 975/16 · Cable ops2016-04-02 → 2016-04-19Cable operations 042200Z apr to 041200Z may by cableship rene descartes vicinity of trackline joining…
- HYDROPAC 752/16 · Cable ops2016-03-16 → 2016-04-11Cable repair operations in progress until 31 may by cableship cable retriever vicinity of trackline between…
- USGS-US10004XBB · Quakes2016-03-14 → 2016-03-17147 km wsw of kurio, japan
- HYDROPAC 687/16 · Cable ops2016-03-10 → 2016-03-19Cable repair operations 15 thru 20 mar, alternate 21 thru 25 mar by M/V kddi ocean link in area bound by…
- HYDROPAC 674/16 · Cable ops2016-03-08 → 2016-03-21Cable laying operations in progress until 22 mar, alternate 23 thru 31 mar by cableship rene descartes…
- HYDROPAC 348/16 · Missiles2016-02-07 → 2016-02-07Rockets
- HYDROPAC 345/16 · Missiles2016-02-06 → 2016-02-07Rockets
- HYDROPAC 338/16 · Missiles2016-02-06 → 2016-02-06Rockets
- HYDROPAC 294/16 · Missiles2016-02-02 → 2016-02-06Rockets
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.