Siayan Island
Encyclopedia
Siayan is one of the Batanes Islands of the Philippines
Philippines
The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

. Also known as Ditarem Island in the native language, the island is about 1/2 mile to 3/4 miles in diameter and lies about 5 miles (8 km) north-northeastward of Itbayat Island
Itbayat Island
Itbayat is one of the Batanes Islands of the Philippines. Together with some other islands it forms the municipality of Itbayat in Batanes Province....

. The closest island is Mabudis Island which is about 1 miles north-northeastward of Siayan. There are several detached rocks off Siayan's northeast side, rendering the channel between it and Mabudis unsafe for larger vessels.

Siayan has an elevation of 538 ft (164 m) and is listed as an inactive volcano by the Philippine Institute of Volcanology and Seismology
Philippine Institute of Volcanology and Seismology
The Philippine Institute of Volcanology and Seismology is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes and tsunamis, as well as other specialized information and services primarily for the protection of life and property and in...

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