Diogo Island known as Di'nem Island is an uninhabited
volcanic island
Geologically, a volcanic island is an island of volcanic origin. The term high island can be used to distinguish such islands from low islands, which are formed from sedimentation or the uplifting of coral reefs (which have often formed ...
in the province of Batanes, the northernmost province in the Philippines. Also known as ''Di'nem'' Island in the native language, Diogo is a lone rock rising out of the sea, with steep cliffs on every side. Dangerous currents make landing there practically impossible. It is an
extinct volcano
A volcano is commonly defined as a vent or fissure in the Crust (geology), crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and volcanic gas, gases to escape from a magma chamber below the surface.
On Earth ...
which has suffered heavily from marine erosion.
[Ferguson, Henry G. (1908-02)]
"The Philippine Journal of Science, Vol.3 Part 1"
p.12. Manila Bureau of Printing, 1908.
Geography
Diogo is a small, round island over high, about in diameter, lying southeastward of
Itbayat Island
Itbayat, officially the Municipality of Itbayat, (; Ilocano: ''Ili ti Itbayat''; ), is a municipality in the province of Batanes, Philippines. In the 2020 census, it had a population of 3,128 people.
Itbayat is the country's northernmost muni ...
. It is steep on the western side but has several small islets lying off its eastern side - the outermost being nearly distant.
Geology
In 1903, Diogo Island was observed to be volcanic, discharging vapor and dark material; but another observation in 1908 indicated that the previous observations were instead small clouds that often hover around the mountain.
It is listed as an
inactive volcano
A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
On Earth, volcanoes are most often fou ...
by the
Philippine Institute of Volcanology and Seismology
The Philippine Institute of Volcanology and Seismology (PHIVOLCS, ; ) is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes, and tsunamis, as well as other specialized information and ...
.
Previous names
In old Spanish maps, the name of the island was listed as ''Isla Diego'' or ''Rodonta''.
[Algué, P. José (1899)]
''Atlas de Filipinas"
p. 39. Washington Government Printing Office, 1900.
See also
*
List of islands of the Philippines
As an archipelago, the Philippines comprises about 7,641 islands clustered into Island groups of the Philippines, three major island groups: Luzon, the Visayas, and Mindanao. Only about 2,000 islands are inhabited,[List of islands
This is a list of the lists of islands in the world grouped by country, by continent, by body of water
A body of water or waterbody is any significant accumulation of water on the surface of Earth or another planet. The term most often refer ...]
*
Desert island
An uninhabited island, desert island, or deserted island, is an island, islet or atoll which lacks permanent human population. Uninhabited islands are often depicted in films or stories about shipwrecked people, and are also used as stereotypes ...
References
{{Authority control
Volcanoes of the Luzon Strait
Inactive volcanoes of the Philippines
Islands of Batanes
Uninhabited islands of the Philippines