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Bismarck Archipelago

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The Bismarck Archipelago (German: Bismarck-Archipel, pronounced [ˈbɪsmaʁk ˌaʁçiˈpeːl]) is a group of islands off the northeastern coast of New Guinea in the western Pacific Ocean and is part of the Islands Region of Papua New Guinea. Its area is about 50,000 square kilometres (19,000 sq mi).

Bismarck Archipelago
Satellite view of the islands of New Britain and New Ireland, the two largest in the Bismarck Archipelago
Geography
LocationPapua New Guinea
Coordinates5°00′S 150°06′E / 5.000°S 150.100°E / -5.000; 150.100
Major islandsNew Britain, New Ireland
Area49,700 km2 (19,200 sq mi)
Highest elevation2,340 m (7680 ft)
Highest pointMount Taron
Administration
Papua New Guinea
RegionIslands Region

History

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The first inhabitants of the archipelago arrived around 30,000–40,000 years ago.[1] They may have traveled from New Guinea, by boat across the Bismarck Sea or via a temporary land bridge, created by an uplift in the Earth's crust.[citation needed] Later arrivals included the Lapita people, the direct ancestors of the Austronesian peoples of Polynesia, eastern Micronesia, and Island Melanesia.

The first European to visit these islands was Dutch explorer Willem Schouten in 1616.[2][3] The islands remained unsettled by western Europeans until they were annexed as part of the German protectorate of German New Guinea in 1884. The area was named in honour of the Chancellor Otto von Bismarck.

On 13 March 1888, a volcano erupted on Ritter Island causing a megatsunami. Almost the entire volcano fell into the ocean, leaving a small crater lake.[4]

 
The first wave of US troops lands on Los Negros, Admiralty Islands, 29 February 1944.

Following the outbreak of World War I, the Australian Naval and Military Expeditionary Force seized the islands in 1914 and Australia later received a League of Nations mandate for the islands. They remained under Australian administration—interrupted only by Japanese occupation during World War II—until Papua New Guinea became independent in September 1975.

Geography

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The Bismarck Archipelago includes mostly volcanic islands with a total land area of 49,700 km2 (19,189 sq mi). The archipelago surrounds the Bismarck Sea and sits upon the North Bismarck Plate, the Manus Plate and the South Bismarck Plate.

Islands are grouped here according to administrative province:

 
Islands of the Bismarck Archipelago (shown in red) within the Provinces of Papua New Guinea.

The passage of water between the islands of New Britain and New Ireland is called St. George's Channel after St. George's Channel in the British Isles between Wales and Ireland.

See also

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Notes

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  1. ^ Leavesley, Matthew G. and Chappell, John. "Buang Merabak: additional early radiocarbon evidence of the colonisation of the Bismarck Archipelago, Papua New Guinea". Antiquity. Durham University. Archived from the original on 4 March 2018. Retrieved 4 March 2018.{{cite web}}: CS1 maint: multiple names: authors list (link)
  2. ^ Sigmond, J. P. and Zuiderbann, L. H. (1976) Dutch Discoveries of Australia, Rigby, Australia. ISBN 0-7270-0800-5
  3. ^ Spate, O. H. K. (1979) The Spanish Lake, Australian National University, Second Edition, 2004. ISBN 1-920942-17-3
  4. ^ Ward, Steven N.; Day, Simon (September 2003). "Ritter Island Volcano —Lateral Collapse and the Tsunami of 1888". Geophysical Journal International. 154 (3). Blackwell Publishing: 891. Bibcode:2003GeoJI.154..891W. doi:10.1046/j.1365-246X.2003.02016.x. In the early morning of 1888 March 13, roughly 5 km3 [1.2 cu mi] of Ritter Island Volcano fell violently into the sea northeast of New Guinea. This event, the largest lateral collapse of an island volcano to be recorded in historical time, flung devastating tsunami tens of metres high on to adjacent shores. Several hundred kilometres away, observers on New Guinea chronicled 3-min period waves up to 8 m [26 ft] high, that lasted for as long as 3 h. These accounts represent the best available first-hand information on tsunami generated by a major volcano lateral collapse. In this article, we simulate the Ritter Island landslide as constrained by a 1985 sonar survey of its debris field and compare predicted tsunami with historical observations. The best agreement occurs for landslides travelling at 40 m/s [130 ft/s], but velocities up to 80 m/s [260 ft/s] cannot be excluded. The Ritter Island debris dropped little more than 800 m [2,600 ft] vertically and moved slowly compared with landslides that descend into deeper water. Basal friction block models predict that slides with shorter falls should attain lower peak velocities and that 40+ m/s [130 ft/s] is perfectly compatible with the geometry and runout extent of the Ritter Island landslide. The consensus between theory and observation for the Ritter Island waves increases our confidence in the existence of mega-tsunami produced by oceanic volcano collapses two to three orders of magnitude larger in scale.

Bibliography

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  • Firth, Stewart (1983). New Guinea Under the Germans. Carlton, Australia: Melbourne University Press. ISBN 0-522-84220-8.
  • Howe, K. R., Robert C. Kiste, Brij V. Lal, eds. (1994). Tides of History: The Pacific Islands in the Twentieth Century. Honolulu: University of Hawaii Press. ISBN 0-8248-1597-1.
  • King, David et al. (1982). Papua New Guinea Atlas: A Nation in Transition. Bathurst, Australia: R. Brown and the University of Papua New Guinea. ISBN 0-909197-14-8.
  • Moore, Clive (2003). New Guinea: Crossing Boundaries and History. Honolulu: University of Hawaii Press. ISBN 0-8248-2485-7.
  • Ryan, Peter, ed. (1972). Encyclopedia of Papua New Guinea. 3 volumes; Vol I: A – K, maps, black and white illustrations, xv + 588pp. Vol II: l – Z, maps, black and white illustrations, 589–1231pp. Vol III: Index, folding colour map in rear pocket, map, colour illustration, v + 83pp. Carlton, Australia: Melbourne University Press. ISBN 978-0-522-84025-4.
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