Blup Blup Island is a small forested island off the northern coast of

Papua New Guinea Papua New Guinea, officially the Independent State of Papua New Guinea, is an island country in Oceania that comprises the eastern half of the island of New Guinea and offshore islands in Melanesia, a region of the southwestern Pacific Ocean n ...

about offshore from Cape Girgir and is considered part of the

Schouten Islands The Biak Islands (, also Schouten Islands or Geelvink Islands) are an island group of Southwest Papua province, eastern Indonesia in the Cenderawasih Bay (or Geelvink Bay) 50 km off the north-western coast of the island of New Guinea. Th ...

. It is located at latitude S 3°30'46" and longitude E 144°35'16". The island has a small population and is theoretically part of the Papuan province of

East Sepik East Sepik is a province in Papua New Guinea. Its capital is Wewak. East Sepik has an estimated population of 450,530 people (2011 census) and is 43,426 km square in size. Its density is 10.4 people per square kilometer. History Cherubim ...

, although officially it is still a

protectorate A protectorate, in the context of international relations, is a State (polity), state that is under protection by another state for defence against aggression and other violations of law. It is a dependent territory that enjoys autonomy over ...

. The island is

volcanic 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 fo ...

stratovolcano A stratovolcano, also known as a composite volcano, is a typically conical volcano built up by many alternating layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with ...

) and a weak

thermal A thermal column (or thermal) is a rising mass of buoyant air, a convective current in the atmosphere, that transfers heat energy vertically. Thermals are created by the uneven heating of Earth's surface from solar radiation, and are an example ...

area exists on the north west coast. The island is only wide with an irregular coastline and ancient

lava flows Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or unde ...

. It is thought that Blup Blup last erupted in the

Holocene The Holocene () is the current geologic time scale, geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene to ...

Fresh water Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salt (chemistry), salts and other total dissolved solids. The term excludes seawater and brackish water, but it does include ...

is available on the island from wells. Other islands in the vicinity include

Kadovar Kadovar is a volcanic island in Papua New Guinea northeast of the much larger island of New Guinea. The volcano erupted in January 2018 and the eruption is ongoing as of 2023, although the activity level is generally considered to be low. There w ...

and Wei Island. There is a small islet about off the south-west shore of the island called Mut Mut, where there is a

geodetic Geodesy or geodetics is the science of measuring and representing the geometry, gravity, and spatial orientation of the Earth in temporally varying 3D. It is called planetary geodesy when studying other astronomical bodies, such as planets ...

monitoring facility.

Description

Blup Blup has been described as deeply eroded. The island features a well developed

reef A reef is a ridge or shoal of rock, coral, or similar relatively stable material lying beneath the surface of a natural body of water. Many reefs result from natural, abiotic component, abiotic (non-living) processes such as deposition (geol ...

, a

lagoon A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into ''coastal lagoons'' (or ''barrier lagoons'') an ...

cinder cones A cinder cone or scoria cone is a steep, conical landform of loose pyroclastic fragments, such as volcanic ash, clinkers, or scoria that has been built around a volcanic vent. The pyroclastic fragments are formed by explosive eruptions or lav ...

, and

hot springs A hot spring, hydrothermal spring, or geothermal spring is a Spring (hydrology), spring produced by the emergence of Geothermal activity, geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow ...

all of which suggest early volcanic activity.

History

The first recorded sighting by Europeans of Kadovar Island was by the Spanish navigator Iñigo Órtiz de Retes on 21 July 1545, when on board of the

carrack A carrack (; ; ) is a three- or four- masted ocean-going sailing ship that was developed in the 14th to 15th centuries in Europe, most notably in Portugal and Spain. Evolving from the single-masted cog, the carrack was first used for Europea ...

''San Juan'' tried to return from

Tidore Tidore (, lit. "City of Tidore Islands") is a city, island, and archipelago in the Maluku Islands of eastern Indonesia, west of the larger island of Halmahera. Part of North Maluku Province, the city includes the island of Tidore (with three sm ...

New Spain New Spain, officially the Viceroyalty of New Spain ( ; Nahuatl: ''Yankwik Kaxtillan Birreiyotl''), originally the Kingdom of New Spain, was an integral territorial entity of the Spanish Empire, established by Habsburg Spain. It was one of several ...

.Coello, Francisco. "Conflicto hispano-alemán". ''Boletín de Sociedad Geográfica de Madrid'', t.XIX. 2º semestre 1885, Madrid, p.317.

References

*
Mut Mut in Papua New Guinea Geodetic Monitoring Site
Islands of Papua New Guinea Volcanoes of Papua New Guinea Holocene stratovolcanoes East Sepik Province {{EastSepikProvince-geo-stub

Description

History

See also

References