The population of the Samoan Islands is approximately 250,000.[1] The inhabitants have in common theSamoan language, a culture known asfa'a Samoa, and an indigenous form of governance calledfa'amatai.[2]Samoans are one of the largestPolynesian populations in the world, and most are of exclusively Samoan ancestry.[3]
The oldest known evidence of human activity in the Samoan Islands dates to around 1050 BC. It comes from aLapita site atMulifanua wharf onUpolu island.[4] In 1768, the eastern islands were visited by the French explorerBougainville, who named them theNavigator Islands. That name was used by missionaries until about 1845, and in official European dispatches until about 1870.[5]
German, British and American warships inApia harbour, 1899.
Politically, the Samoan Islands are divided into two jurisdictions:[1]
Samoa, an independent nation that gained political independence fromNew Zealand in 1962. It comprises the western half of the Samoan Islands, (2,831 km2 (1,093 sq mi) and 196,000 inhabitants (2016)). It was known asGerman Samoa from 1900 to 1914, and asWestern Samoa until 1997.
In the late 19th century, competition for political control of the islands between theUnited States,Germany, and theUnited Kingdom resulted in the December 1899Tripartite Convention, which formally partitioned the Samoan archipelago into a German colony (German Samoa) in the western half and a United States territory (American Samoa) in the eastern half.[6]New Zealand began occupying the western islands in World War I, while they were still a German colony and continued as an occupying force until 1920. Then, from 1920 until Samoa's independence in 1962, New Zealand governed the islands in that group under aLeague of Nations Class C Mandate from 1920 to 1946,[7] and as aUnited Nations Trust Territory from 1946 to 1962. The force that eventually led to the political independence of the western islands in 1962 was the pro-independenceMau movement, which gained popularity across the area. The eastern islands remain a political territory of the United States.[8]
Savaiʻi: population 43,819 (2016);[12] largest landmass; westernmost in the group; most recent volcanic eruptions. Eruptions:Mt Matavanu (1905–1911);Mata o le Afi (1902);Mauga Afi (approximately 1725).
The islands of Manono, Apolima and Nuʻulopa lie in theApolima Strait between Upolu and Savaiʻi. The four small, uninhabited islands – Nuʻutele, Nuʻulua, Namua and Fanuatapu – are situated off the east coast of Upolu and comprise theAleipata Islands.[10]
Aunu'u: population 473 (per 2020 census); located southeast of Tutuila.
Swains Island: unpopulated (per 2020 census); politically administered by American Samoa, but culturally part ofTokelau;copra plantation.
Ofu‑Olosega: volcanic doublet encompassing Ofu (population 132, per 2020 census) and Olosega (population 147, per 2020 census); in the Manu'a Group of islands.
Ta'ū: population 236 (per 2020 census); largest island in theManu'a Group
Manu (Rose Atoll): unpopulated (per 2020 census); conservation habitat for native birdlife, marine life,green turtle and endangeredhawksbill turtle.
The islands are approximately 800 km (500 mi) fromFiji, 530 km (330 mi) fromTonga, 2,900 km (1,800 mi) fromNew Zealand, and 4,000 km (2,500 mi) fromHawaii, U.S.[10]
The islands lie between 13° and 14° south latitude and 169° and 173° west longitude, and span an area of about 480 km (300 mi) from west to east.[10]
The larger islands arevolcanic in origin, mountainous, and covered in tropical moist forest. Some of the smaller islands arecoral atolls with black sand beaches.[16][17]
The highest point in Samoa is Mt.Silisili, on the island ofSavai'i. At 1,858 m (6,096 ft), it is also one of the highest peaks in Polynesia.[18] The highest peak in American Samoa is onTa’u,Lata Mountain, at 966 m (3,169 ft).[19]: 3
Upolu andSavai'i in Samoa are among the largest of the Polynesian islands, at 1,718 km2 (663 sq mi) and 1,125 km2 (434 sq mi), respectively,[20] Their size is exceeded only by the two substantially larger main islands of New ZealandTe Waipounamu andTe Ika-a-Māui as well asRakiura, and the two main islands of Fiji and the Hawaiian islands ofHawaiʻi andMaui.[10] The island of Upolu has more inhabitants than the island of Savai'i does.[9]
The next largest island isTutuila, where the city and harbor ofPago Pago (with a population of 3,519 in 1990) is located. Tutuila is much smaller than Upolu and Savai‘i, at 136.2 km2 (52.6 sq mi) in area, but it is the largest island in American Samoa.[11] The highest point on Tutuila is Matafao Peak.[21]
Smaller islands in the archipelago include the three islets (Manono Island,Apolima andNu'ulopa) located in theApolima Strait between Savai'i and Upolu; the fourAleipata Islands off the eastern end ofUpolu (Nu'utele,Nu'ulua,Namua, andFanuatapu); and Nu‘usafe‘e.[22]Aunu'u is a small island off the eastern end of Tutuila. To the east of Tutuila, theManu'a group comprisesOfu, Olosega, andTa’u. An uninhabited coral atoll,Rose Atoll, is the southernmost point in the territory of the United States. Another coral atoll,Swains Island, is within the territory of American Samoa but is geographically distant from the Samoan archipelago.[11]
In 1892, the Samoan islands shifted to the eastern side of theInternational Date Line. The rulerMalietoa Laupepa issued a proclamation that Monday, July 4 would occur twice, giving an extra day in July 1892.[23] This change, which occurred on theAmerican Independence Day, was likely due to increasing trade with Americans. The islands would be on the same day as the United States.[24]
By 2011, the government of independent Samoa decided to shift back to the western side in order to have the same day as Australia and New Zealand. Being one day behind these countries, Samoa's primary trading partners, left only four business days in a week. The shift was implemented by skipping Friday, December 30; workers were paid for this "missed" day. NeighboringTokelau shifted as well on this day.[24]
Thevolcanic Samoa island chain may have been formed by the activity of theSamoa hotspot at the eastern end of the Samoa Islands. In theory, that hotspot was created by the movement of thePacific tectonic plate over a 'fixed' deep and narrowmantle plume spewing up through the Earth's crust. One piece of evidence that this activity may have created the islands is that they generally lie in a straight east-to-west line, and the plate is moving from east to west. However, some characteristics of the Samoa islands are inconsistent with this theory. The classic hotspot model (based mostly on studies of theHawaii hotspot) predicts that, if plate movement over a hotspot is what created a volcanic island chain, then the farther away from the hotspot the islands andseamounts in the chain are, the older they will prove to be. Some of the evidence is inconsistent with this explanation for the creation of the Samoa island chain, creating an enigma for scientists. For one thing,Savai'i, the most western of the Samoa island chain, andTa'u Island, the most eastern, both erupted in the last century.[25] For another thing, thesubaerial rock samples initially collected from Savai'i, the westernmost of the islands, are too young by several million years to fit the classic hotspot model of age progression in an island chain. These facts led some scientists to suggest that the Samoa islands were not formed by the hotspot plume. One possible explanation for the inconsistency of the data with the hotspot formation theory is the fact that the island chain lies just north of theTonga Trench. An alternative theory is that the islands were formed bymagma seeping through cracks in stressedfracture zones. However, in 2005, an international team found new evidence that supports the hotspot model. They gathered additional samples from Savai'i – submarine samples from the deep flanks andrifts of the island. Tests found that these samples are much older than the previously collected samples: They are about five million years old, an age that fits the hotspot model.[26]
TheVailulu'u Seamount, an active submerged volcano, lies 45 km (28 mi) east of Ta'u inAmerican Samoa. It was discovered in 1975 and has since been studied by an international team of scientists, contributing towards understanding of the Earth's fundamental processes.[29] Growing inside the summit crater of Vailulu'u is an active underwatervolcanic cone, named after Samoa's goddess of war,Nafanua.[30]
The Samoan climate is tropical, with a rainy season from November to April. The island group is frequently hit bytropical cyclones between December and March, due to its position in the South Pacific Ocean.[31]
^Fana'afi Le Tagaloa, Aiono (1986)."Western Samoa: the sacred covenant".Land Rights of Pacific Women. Institute of Pacific Studies of the University of the South Pacific. p. 103.ISBN982-02-0012-1. Retrieved17 April 2010.
^Ryden, George Herbert.The Foreign Policy of the United States in Relation to Samoa. New York: Octagon Books, 1975. (Reprint by special arrangement with Yale University Press. Originally published at New Haven: Yale University Press, 1928), p. 574. The Tripartite Convention (United States, Germany, Great Britain) was signed at Washington on December 2, 1899, with ratifications exchanged on February 16, 1900.
^date of ratification by the League of Nations was 10 January 1920; Class C mandates were designed for populations considered incapable of self-government
^Sunia, Fofo I.F. (2009).A History of American Samoa. Amerika Samoa Humanities Council.ISBN978-1573062992.
^Craig, P. (ed.)."Natural History Guide to American Samoa"(PDF). National Park of American Samoa, Department Marine and Wildlife Resources, American Samoa Community College. Retrieved16 August 2009.
^Lippsett, Laurence (3 September 2009)."Voyage to Vailulu'u".Woods Hole Oceanographic Institution. Retrieved19 April 2010.
^Koppers, A. A.; Russell, J. A.; Staudigel, H.; Hart, S. R. (2006). "New 40Ar/39Ar Ages for Savai'i Island Reinstate Samoa as a Hotspot Trail with a Linear Age Progression".AGU Fall Meeting Abstracts.2006: V34B–02.Bibcode:2006AGUFM.V34B..02K.