Korea Strait at a glance
- 102 maverage depth
- 104 mmedian depth
- 1,151 mmaximum depth
- 86,332 km²water area
Korea Strait is a strait. Inside its outline the GEBCO grid has about 86,332 km² of water, with an average depth of about 102 m (the middle value is 104 m) and a maximum of 1,151 m, found at 35.77° N, 129.95° E.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Korea Strait?
The bar splits the Korea Strait's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 97.5%
- 200 to 1,000 m: 2.4%
- 1,000 to 4,000 m: 0.1%
- 4,000 to 6,000 m: 0%
- below 6,000 m: 0%
Named features near the deepest point: Tsushima Basin (177 km), Jeffrey Deep (367 km), Yamato Ridge (596 km), Ōmurodashi (873 km).
The Korea Strait if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Korea Strait's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 2,376 km² | 2.8% |
| 20 m | 5,351 km² | 6.2% |
| 50 m | 15,396 km² | 17.8% |
| 80 m | 26,005 km² | 30.1% |
| 120 m | 58,514 km² | 67.8% |
| 200 m | 84,185 km² | 97.5% |
| 500 m | 85,953 km² | 99.6% |
| 1,000 m | 86,293 km² | 100% |
| 2,000 m | 86,332 km² | 100% |
| 3,000 m | 86,332 km² | 100% |
| 4,000 m | 86,332 km² | 100% |
| 6,000 m | 86,332 km² | 100% |
A simple bathtub model: it lowers the sea everywhere by the same amount and does not simulate how water would really drain.
Nearby seas
- Inner Sea average depth about 38 m
- Yellow Sea average depth about 46 m
- East China Sea average depth about 403 m
- Bo Hai average depth about 18 m
- Sea of Japan average depth about 1,725 m
- Philippine Sea average depth about 4,472 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Korea Strait?
On average about 102 m in the GEBCO grid (the middle value is 104 m). The deepest cell inside its outline is 1,151 m, at 35.77° N, 129.95° E.
How big is the Korea Strait?
About 86,332 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Korea Strait would be land if sea level dropped?
With the sea 10 m lower, about 2,376 km² (2.8%) of its water would be land. At 6,000 m lower, 100% would be. This is a simple bathtub model that lowers the sea evenly everywhere.
Data: depths from the GEBCO_2026 grid, statistics worked out inside the Natural Earth outline of the strait. See data sources and licences. The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea.