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Ofu-Olosega
Ofu-OlosegaFromSpace.jpg
Ofu-Olosega from Space Shuttle.
Elevation 639 m (2,096 ft)
Prominence 639 m (2,096 ft)
Location
Location American Samoa
Coordinates 14°10′30″S 169°37′05″W / 14.175°S 169.618°W / -14.175; -169.618Coordinates: 14°10′30″S 169°37′05″W / 14.175°S 169.618°W / -14.175; -169.618
Topo map USGS
Geology
Type Shield volcanoes
Last eruption September to November 1866

Ofu and Olosega are parts of a volcanic doublet in the Manu‘a Group of the Samoan Islands—part of American Samoa. The twin islands, formed from shield volcanoes, have a combined length of 6 km. They are geographic volcanic remnants separated by the narrow 137m wide Asaga strait, a natural bridge of shallow coral reef. Before 1970, one had to wade between the two islands at low tide; now a single-lane road bridge over the strait connects villages on Ofu island with those on Olosega.

The highest peak on Ofu is Mount Tumutumu (491m, also referred to as Tumu) and the highest elevation on Olosega is Mount Piumafua (629m). The most recent volcanic eruption took place in 1866, 3 km south east of Olosega.[1]

Archaeology field work carried out in the 1980s yielded pre-historic evidence including ceramics, adzes, shell and bone which have been significant in furthering understanding of the ancient history of the Samoa Islands and Polynesia. This included samples of red-slipped plainware ceramics that appeared to be in the tradition of Lapita culture. The work, carried out by a team that included Pacific archaeology specialist Patrick Vinton Kirch, focused on a site called To'aga (site AS-13-1), a 2 km coastal stretch on the south coast of Ofu. The results showed continuous human habitation of about 3,000 years.[2]

Ofu[edit]

South shore of Ofu seen from Olosega across the narrow strait that separates them. The sharp peak, an eroding dike complex, is named Sunu‘itao.

Ofu is the western part of the volcanic outcrop of Ofu-Olosega Island. The main village of Ofu is located on the western shore, protected behind an offshore islet (eroded tuff cone) known as Nu'utele. Ofu has a small airport (IATA: OFUICAO: NSAS) and a boat harbor that serve the population on Ofu and Olosega. Before regular airline service was discontinued in 2009, the flight from Pago Pago took about half an hour.

Olosega village 1896

Most of the southern shore and associated coral reef are part of the National Park of American Samoa. In 2005 the U.S. National Park Service was negotiating with village councils on Olosega to expand the park around that island.

The island forms the Ofu County subdivision of the Manua District. It has a land area of 7.215 km² (2.786 sq mi), and had an official population of 289 persons as of the 2000 census.

Situated on the south coast of the island is To'aga lagoon which has a high diversity of corals and fishes. The marine site has been part of long term research and study on coral reefs and global climate change.

The island is also home to the Samoa Flying-fox (Pteropus samoensis), a species of bat threatened by habitat loss.

Olosega[edit]

Aerial view - Olosega village on the right, Ofu on the left. Both islands are connected via a single-lane bridge, crossing the Asaga strait.

Olosega Island is a remnant of the Sili shield volcano, the caldera of which may lie submerged off the north shore.

The volcanic eruption of 1866 was actually 3 km east of Olosega, on a submarine ridge that extends east southeast to nearby Ta‘ū.

The island forms the Olosega County subdivision of the Manua District. It has a land area of 5.163 km² (1.993 sq mi), and had an official population of 216 persons as of the 2000 census.

There are two villages on Olosega: Olosega and Sili. Sili, situated on the northwestern-facing shore, now consists of but one standing inhabited residence after much of the village was destroyed by cyclones (and subsequently abandoned).

Almost all the population of Olosega now reside in Olosega village along the southwestern-facing shore.

Olosega village also has Olosega Elementary School with instruction through grade 9 for children on both islands.

Gallery[edit]

See also[edit]

References[edit]

  1. ^ "Global Volcanism Program, Ofu-Olosega". Smithsonian National Museum of Natural History. Retrieved 13 July 2010. 
  2. ^ Jason Tyler, Patric V. Kirch, Terry L. Hunt, Lisa Nagaoka (November 1989). "Final Report on Archaeological Investigations at Site AS-13-1, To'aga, Ofu Island, American Samoa". Department of Parks and Recreation, Government of American Samoa. Retrieved 13 July 2010. 

External links[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Ofu-Olosega — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
346 videos foundNext > 

Segaula Takeoff from Tutuila to Ofu/Olosega

Tyler Brooks and Terry White Jump The Ofu Olosega Bridge

It's November 13, 2011, and Tyler Brooks and Terry White jump from the Ofu-Olosega Bridge. Music: "Farewell Sails" by Terry Skaggs.

Jumping From The Ofu/Olosega Bridge

First Tyler and a local kid jump at low tide, then Jay jumps at high tide.

FLYIN PAST OFU AND OLOSEGA, MANU'A SAMOA

PARADISE.

Christmas Day 2010 Ofu Island

Scenes of the umu preparation, pig roast, and cricket match on Ofu & Olosega Islands, Christmas day, 2010.

HAPPY 108th BIRTHDAY, MANU'ATELE!!!

7/16/12 Manu'atele (Ta'u, Faleasao, Fitiuta, Ofu, Olosega & Sili) celebrate it's 108th birthday!

Flying Doctors of America ~ American Samoa ~ August, 2010

Flying Doctors of America medical/dental mission in American Samoa. Pago Pago, and other regions of Tutuila Island & Manu'a Islands of Ta'u and Ofu-Olosega.

Olosega & Faleasao's Performance (Arts Council Program)

Olosega - Swains Island 2013

Uninhabited Swains Island in the middle of the Pacific Ocean.

olosega

family xmas 08.

346 videos foundNext > 

20 news items

 
VolcanoDiscovery
Fri, 24 Oct 2014 06:37:47 -0700

The lava flow continues to advance towards Pahoa and might cut the first road very soon. During an overflight on 22 Oct, the most advanced front of the 27 June flow, a narrow lobe, was only approx. 480 m away from the Apa'a road. The rate of advance of ...
 
VolcanoDiscovery
Wed, 19 Nov 2014 10:54:09 -0800

Largest breakout point from lava tube near the forested hill Pu`u Kahauale`a, 1.6km/1.0mi from Pu`u `Ō`ō, on November 17, 2014 (USGS-HVO). USGS-HVO visible and infrared image of lava flows leaking above lava tube as surge moves through on ...
 
VolcanoDiscovery
Mon, 10 Nov 2014 22:15:20 -0800

County of Hawaii media image of burning house on November 10, 2014 on the outskirts of Pahoa village. Latest update map from USGS-HVO showing lava near transfer station on November 10. 2-week old map of lava flow first crossing the residence area ...
 
VolcanoDiscovery
Tue, 28 Oct 2014 12:41:15 -0700

The lava front has now reached residential areas and moved closer to the first houses. One was at only 100 m distance last evening and is likely to become its first victim very soon. Residents of Pahoa are preparing to evacuate their homes. From HVO's ...
 
VolcanoDiscovery
Wed, 03 Sep 2014 19:53:28 -0700

USGS-HVO photo of lava flowing back into a large crack near Kaohe Homesteads on September 1, 2014. According to officials, the June 27th lava flow has reemerged for the second time from a huge ground crack along Kilauea's east rift zone, this time ...
 
VolcanoDiscovery
Sat, 01 Feb 2014 01:03:26 -0800

The discolored water plume from Kavachi volcano (NASA Earth Observatory image by Jesse Allen and Robert Simmon, using EO-1 ALI data from the NASA EO-1 team. Caption by Robert Simmon). A submarine eruption is likely occurring at the submerged ...
 
RedOrbit
Tue, 05 Mar 2013 07:08:41 -0800

The National Park of American Samoa is located in the American territory known as American Samoa. The park is actually divided into three different areas comprised of the islands of Ta'ū, Tutuila, and Ofu-Olosega. This park was legally established by ...
 
VolcanoDiscovery
Wed, 18 Sep 2013 03:57:02 -0700

A small earthquake swarm occurred last week under the volcano. During 5-7 September, HVO detected about 350 small earthquakes up to magnitude 2.4 in a tightly clustered area at about 7 km depth west of the summit caldera. Only about 25 were strong ...
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