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% |
| Containers | 6 | 1% |
| Other | 6 | 1% |
| Wrecks | 4 | 1% |
| Volcanic | 3 | 1% |
| Debris | 3 | 1% |
| Spills | 2 | 0% |
Archive · 544 cancelled
- USGS-US6000KDRQ · Quakes2023-05-21 → 2023-05-24135 km wsw of kurio, japan
- HYDROPAC 1230/23 · Exercises2023-04-14 → 2023-04-16Hazardous operations 160100Z to 160700Z apr in area bound by 26-56.40N 122-22.08E, 26-32.94N 121-57.06E,…
- HYDROPAC 3624/22 · Cable ops2022-12-19 → 2022-12-23Cable operations in progress until 26 dec by cableship kddi ocean link in area bound by 25-37.62N…
- HYDROPAC 3562/22 · Cable ops2022-12-12 → 2022-12-19Cable operations 14 thru 18 dec, alternate 19 thru 21 dec by cableship kddi ocean link in area bound by…
- HYDROPAC 2950/22 · Cable ops2022-10-20 → 2022-10-30Cable operations 25 thru 29 oct alternate 30 thru 03 nov by M/V kddi ocean link in area bound by 25-48.50N…
- USGS-US7000I91N · Quakes2022-09-18 → 2022-09-21166 km w of itoman, japan
- HYDROPAC 2138/22 · Exercises2022-08-05 → 2022-08-07Gunnery exercises in progress until 070400Z aug in area bound by 25-03.00N 122-11.00E, 25-34.00N 122-11.00E,…
- HYDROPAC 1726/22 · Cable ops2022-06-23 → 2022-07-09Cable operations 261600Z jun to until further notice by cableship lodbrog in area bound by 25-47.10N…
- USGS-US7000HIIL · Quakes2022-06-19 → 2022-06-22126 km wnw of naha, japan
- USGS-US7000HEKU · Quakes2022-06-03 → 2022-06-06140 km wnw of naha, japan
- USGS-US7000H7S7 · Quakes2022-05-07 → 2022-05-10137 km wnw of naha, japan
- USGS-US7000H1LC · Quakes2022-04-13 → 2022-04-16145 km wnw of naha, japan
- USGS-US6000H5UK · Quakes2022-03-18 → 2022-03-21147 km n of ishigaki, japan
- USGS-US6000H5CY · Quakes2022-03-17 → 2022-03-20146 km wnw of naha, japan
- USGS-US7000GMRX · Quakes2022-02-21 → 2022-02-24143 km wnw of naha, japan
- USGS-US7000GJ4Q · Quakes2022-02-08 → 2022-02-11Earthquake magnitude 5.6 (mww) in 26.840N 126.525E, depth 10 km at 081636Z feb 22
- USGS-US6000GFD9 · Quakes2021-12-26 → 2021-12-29Earthquake magnitude 5.9 (mww) in 25.209N 125.603E, depth 19 km at 260826Z dec 21
- USGS-US6000GAQ5 · Quakes2021-12-09 → 2021-12-12116 km n of naze, japan
- HYDROPAC 3428/21 · Incidents2021-11-29 → 2021-12-17One person missing from M/V pride pacific in vicinity 27-29.56N 122-04.28E at 281805Z nov
- HYDROPAC 3319/21 · Cable ops2021-11-17 → 2021-11-23Cable operations 18 thru 23 nov, alternate 24 thru 29 nov by cableship fu hai along trackline joining…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.