Conchagüita volcano at the SE tip of El Salvador forms a small 4-km-wide island in the Gulf of Fonseca separated from Conchagua volcano across a narrow strait. The volcano is a sharp-topped cone with a 100-m-wide summit crater at the southern end and contains a young lava delta that forms a peninsula on the island's eastern side. A crescent-shaped crater open to the west is located at the northern end of the island. The only known historic activity from Conchagüita volcano were small ash emissions in 1892.