Ivuhos Island is one of the islands of Batanes

Batanes

The Province of Batanes , also called the Batanes Islands, is a Philippine province comprising ten islands that are located in the Luzon Strait between the islands of Luzon and Taiwan...

, the northernmost province

Provinces of the Philippines

The Provinces of the Philippines are the primary political and administrative divisions of the Philippines. There are 80 provinces at present, further subdivided into component cities and municipalities. The National Capital Region, as well as independent cities, are autonomous from any provincial...

 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...

. The uninhabited island is located west of Sabtang Island

Sabtang Island

Sabtang is an inactive volcanic island, one of the Batanes Islands of the Philippines. Together with some other islands it forms the municipality of Sabtang in Batanes Province.-External links:*...

 and is separated by a deep channel

Channel (geography)

In physical geography, a channel is the physical confine of a river, slough or ocean strait consisting of a bed and banks.A channel is also the natural or human-made deeper course through a reef, sand bar, bay, or any shallow body of water...

 nearly 2 kilometres (1.2 mi) wide.

Ivuhos Island is small and rather low, except a hill on the south end. A coral beach before the hill on the eastern side is the only safe landing place on the island. The shores on both sides of the channel are bordered by reef. The flood tide sets southward with a velocity from 3 to 4 knots, and the ebb northward.

People

The island is currently uninhabited but the early survey by the U.S. Geodetic Survey in the early 1900s found a settlement near the south end of the island.

Geology

The island of Ivuhos consists entirely of coral limestone

Limestone

Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....

 rising in steep cliffs to a height of over 60 metres (196.9 ft). These surround the island, except on the eastern side where the land rises gently from the fringe of sand dunes and small ponds around the shore, in contrast to the 300 metres (984.3 ft) agglomerate

Agglomerate

Agglomerates are coarse accumulations of large blocks of volcanic material that contain at least 75% bombs...

 cliff

Cliff

In geography and geology, a cliff is a significant vertical, or near vertical, rock exposure. Cliffs are formed as erosion landforms due to the processes of erosion and weathering that produce them. Cliffs are common on coasts, in mountainous areas, escarpments and along rivers. Cliffs are usually...

s of the island of Sabtang less than 2 kilometres (1.2 mi) distant. The surface of Ibujos is gently rolling, but without any streams or definite stream valleys. This condition is partly due to the solubility of the rock which allows water to run off in underground channels, but it is also in large part an effect of the recent date of the uplift which formed the island, which has not allowed sufficient time for the streams to form valleys. The soil seems to be volcanic ash rather than limestone.

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...

 (PHIVOLCS) classified Ivujos Island (listed as Ibahos Island) as an inactive volcano of the Philippines.

An unnamed submarine volcano

Unnamed volcano (Ibugos)

Unnamed volcano , is a submarine volcano near the island Ibugos in the Philippines.-Location:The volcano is located 5 kilometres off Ibugos Island, one of the Batanes Islands, in the province of Batanes, in the Cagayan Valley Region, in the Philippines, within the Luzon Strait between Luzon and...

 is located 5 kilometres (3.1 mi) west of Ivujos, which last erupted in 1854. The seamount

Seamount

A seamount is a mountain rising from the ocean seafloor that does not reach to the water's surface , and thus is not an island. These are typically formed from extinct volcanoes, that rise abruptly and are usually found rising from a seafloor of depth. They are defined by oceanographers as...

rises to just 24 metres (78.7 ft) below the water surface.