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Available Weekly Reports
There are no Weekly Reports available for Savai'i.
Summary of eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1905 Aug 4||1911 Nov||Confirmed||2||Historical Observations||Matavanu (north flank 402 m)|
|1902 Oct 30||1902 Nov 17 ± 4 days||Confirmed||1||Historical Observations||Mata Ole Afi (1649 m)|
|1760||Unknown||Confirmed||2||Historical Observations||Mauga Afi (west-central Toasivi ridge)|
|1610 ± 200 years||Unknown||Confirmed||Radiocarbon (corrected)||Le'ele|
|1350 ± 50 years||Unknown||Confirmed||Radiocarbon (corrected)||Tafua Savai'i?|
|1310 ± 50 years||Unknown||Confirmed||Radiocarbon (corrected)|
|1240 ± 30 years||Unknown||Confirmed||Radiocarbon (corrected)|
|1040 ± 150 years||Unknown||Confirmed||Radiocarbon (corrected)|
|0170 ± 100 years||Unknown||Confirmed||Radiocarbon (corrected)|
|0480 BCE ± 300 years||Unknown||Confirmed||Radiocarbon (corrected)|
|1150 BCE ± 150 years||Unknown||Confirmed||Radiocarbon (corrected)|
|1990 BCE ± 150 years||Unknown||Confirmed||Radiocarbon (corrected)||North flank (Maugaloa)|
The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.
IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..
Jensen H I, 1906. The geology of Samoa, and the eruptions in Savaii. Proc Linnean Soc New South Wales, 31: 641-672.
Kear D, Wood B L, 1959. The geology and hydrology of western Samoa. New Zeal Geol Surv Bull, 63: 1-92.
Nemeth K, Cronin S J, 2009. Volcanic structures and oral traditions of volcanism of Western Samoa (SW Pacific) and their implications for hazard education. J Volc Geotherm Res, 186: 223-237.
Nemeth K, Cronin S J, Lolo F, Leavasa M, Solomona D S, Nelson F, 2007. Volcanic evolution, oral traditions of volcanism of Western Samoa (SW Pacific) and their volcanic hazard implications. Geol Soc New Zeal, New Zeal Geophys Soc Joint Annual Conf, Prog Abs, p 113.
Richard J J, 1962. Kermadec, Tonga and Samoa. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 13: 1-38.
Stearns H T, 1944. Geology of the Samoan Islands. Geol Soc Amer Bull, 55: 1279-1332.
Savai'i, the largest and highest of the Samoan islands, consists of a massive basaltic shield volcano constructed along a WNW-ESE-trending rift zone that splits into two rifts on the east side of the 75-km-long, oval-shaped island. Pliocene and Pleistocene shield formation was followed by stream and marine erosion, partial submergence, and growth of coral reefs. Late-stage Pleistocene and Holocene eruptions produced voluminous lava flows that partially buried fringing reefs. Numerous cinder cones and lava cones dot the broad crest of Savai'i, which has a low-angle, dome-like profile and reaches an elevation of 1858 m. Additional cones occur on the north-central flank, and a large number are found in the south-central part of the island. Three eruptions, including two in the 20th century, occurred in historical time, and produced voluminous lava flows that reached the northern coast along broad fronts up to about 15 km wide, destroying several villages and overtopping fringing reefs.