North Danger Reef
| Disputed atoll | |
|---|---|
| Other names | Vietnamese: Cụm Song Tử Chinese: 双子群礁, pinyin: Shuāngzǐ Qúnjiāo |
| Geography | |
| Location | South China Sea |
| Coordinates | 11°25′N 114°21′E / 11.417°N 114.350°E |
| Archipelago | Spratly Islands |
| Total islands | 2 |
| Major islands | Northeast Cay, Southwest Cay |
| Claimed by | |
North Danger Reef (Vietnamese: Cụm Song Tử) is one of the seven major reefs / banks / etc. in the Spratly Islands area of the South China Sea. It is the most North Western of the features of the Spratly Islands, located to the NW of Dangerous Ground.
The reef is a large (8.5 nautical miles) approximately circular atoll with a central lagoon (~20m deep). The surrounding reef is shallow.