Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Ofu-Olosega
A narrow strait (just left of center) separates the two triangular islands of Ofu (left) and Olosega (right) in eastern Samoa. The islands are formed by two eroded, coalescing shield volcanoes. The narrow, steep-sided ridge forming the W side of Ofu Island is cut by volcanic dikes and an intrusive plug forms the sharp spire on Ofu Island to the left. A submarine eruption took place in 1866 at the far end of the two islands, 3 km SE of Olosega, along the ridge connecting Olosega with Ta'u Island. Photo by Peter Craig, 1995 (U.S. National Park Service).
Volcano Number:244010
Volcano Name:Ofu-Olosega
Country:United States
Volcano Type:Shield(s)
Last Eruption:1866 CE
Elevation:639m
Tectonic Setting:Subduction zone / Oceanic crust (< 15 km)
Pop. within 5km:220
Pop. within 10km:384
Pop. within 30km:1387
Pop. within 100km:1387
Latitude:-14.175
Longitude:-169.618



Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Volcano Number Volcano Name Eruption Number Activity Type Explosivity Index Max Explosivity Index Modifier Activity Area Activity Unit Start Evidence Method Start Date End Date
244010 Ofu-Olosega 14804 Confirmed Eruption 2 Submarine vent 3 km SE of Olosega Historical Observations 1866/9/12 1866/11/15
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.


Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal


Data from the SESAR Database


Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.