Siayan Island

Siayan is an uninhabited island of Batanes, the northernmost archipelagic province of the Philippines. Also known as Ditarem Island in the native language,^[1] the island is about 1/2 mile to 3/4 miles in diameter and lies about 5 miles (8.0 km) north-northeastward of Itbayat Island.

LocationLuzon Strait

Coordinates20°54′12″N 121°54′10″E

ArchipelagoBatanes Group of Islands

RegionCagayan Valley

Quick facts Native name: Ditarem, Geography ...

Siayan

Native name: Ditarem
Siayan Location in Batanes Show map of Batanes Siayan Location in Luzon Show map of Luzon Siayan Location in Philippines Show map of Philippines
Geography
Location	Luzon Strait
Coordinates	20°54′12″N 121°54′10″E
Archipelago	Batanes Group of Islands
Administration
Philippines
Region	Cagayan Valley
Province	Batanes
Municipality	Itbayat

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The closest island is Mavulis Island, which is about 1.5 miles (2.4 km) north-northeast of Siayan. There are several detached rocks off Siayan's northeastern side, rendering the channel between it and Mabudis unsafe for larger vessels.^[2]

Siayan has an elevation of 538 ft (164 m) and is listed as an inactive volcano^[3] by the Philippine Institute of Volcanology and Seismology.