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 1570/07 · Cable ops2007-09-11 → 2007-10-01Seismic survey in progress until 30 sep by M/V geco searcher towing eight 5000 meter long cables in area…
- USGS-USP000FJ2D · Quakes2007-08-07 → 2007-08-10136 km wnw of nago, japan
- USGS-USP000FHHF · Quakes2007-07-31 → 2007-08-03134 km nw of nago, japan
- HYDROPAC 1218/07 · Nav aids2007-07-14 → 2007-07-14Nga chart 97461 (9TH ed)
- HYDROPAC 1032/07 · Cable ops2007-06-12 → 2007-06-18Cable repair operations 13 thru 18 jun, alternate 19 thru 22 jun, by cableship tyco durable vicinity of…
- HYDROPAC 1006/07 · Cable ops2007-06-09 → 2007-06-12Cable repair operations in progress until 11 jun, alternate 12 thru 15 jun by cableship tyco durable…
- USGS-USP000FA76 · Quakes2007-04-20 → 2007-04-23102 km nne of nago, japan
- USGS-USP000FA4Z · Quakes2007-04-20 → 2007-04-2397 km n of hirara, japan
- USGS-USP000FA4B · Quakes2007-04-20 → 2007-04-2394 km nnw of hirara, japan
- USGS-USP000FA44 · Quakes2007-04-20 → 2007-04-23102 km n of hirara, japan
- USGS-USP000FA3S · Quakes2007-04-20 → 2007-04-23103 km n of hirara, japan
- USGS-USP000FA3R · Quakes2007-04-20 → 2007-04-23103 km nnw of hirara, japan
- HYDROPAC 582/07 · Cable ops2007-03-30 → 2007-04-15Cable repair operations in progress until 14 apr by cableship segero in area bound by 30-19.6N 125-33.5E,…
- HYDROPAC 579/07 · Cable ops2007-03-30 → 2007-04-05Seismic survey in progress until 04 apr by M/V tamhae 2 towing 1500 meter long cable in area bound by…
- HYDROPAC 546/07 · Cable ops2007-03-25 → 2007-03-30Cable repair operations 26 mar thru 03 apr by cableship segero in area bound by 30-19.6N 125-33.5E, 30-19.3N…
- USGS-USP000EZYX · Quakes2006-12-10 → 2006-12-1352 km s of koshima, japan
- USGS-USP000EY17 · Quakes2006-11-17 → 2006-11-20Earthquake magnitude 6.2 (mwc) in 28.591N 129.895E, depth 22 km at 171803Z nov 06
- USGS-USP000ES6Q · Quakes2006-08-31 → 2006-09-0371 km ne of naze, japan
- USGS-USP000EQTP · Quakes2006-08-12 → 2006-08-1570 km ne of naze, japan
- HYDROPAC 1367/06 · Incidents2006-07-21 → 2006-09-07Distress signal received on 406 mhz from M/V YINHAI6 in 25-58-58N 119-28-26E at 210146Z jul
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.