Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Three Sisters
North Sister volcano on the right and Middle Sister on the left, seen from Broken Top volcano to the south, are the two northernmost volcanoes in the Three Sisters volcano group in the central Oregon Cascades. Glaciers have deeply dissected the Pleistocene North Sister volcano, but young Holocene lava flows from cinder cones on its north flank have erupted in the past few thousand years. Photo by Lee Siebert, 1982 (Smithsonian Institution).
Volcano Number:322070
Volcano Name:Three Sisters
Country:United States
Volcano Type:Complex
Last Eruption:440 CE
Elevation:3159m
Tectonic Setting:Subduction zone / Continental crust (> 25 km)
Pop. within 5km:0
Pop. within 10km:0
Pop. within 30km:5672
Pop. within 100km:279885
Latitude:44.133
Longitude:-121.767



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
322070 Three Sisters 20589 Confirmed Eruption 2 ? WNW of North Sister (Sims Butte) Tephrochronology -7350
322070 Three Sisters 20590 Confirmed Eruption 2 ? North of North Sister (Yapoah Cone) Tephrochronology -800
322070 Three Sisters 20591 Confirmed Eruption 2 ? NW of North Sister (Four-in-One Cone) Radiocarbon (corrected) 40
322070 Three Sisters 20592 Confirmed Eruption 2 ? NW of North Sister (Collier Cone) Radiocarbon (corrected) 440
322070 Three Sisters 20593 Confirmed Eruption 4 SW flank of South Sister (Rock Mesa) Radiocarbon (uncorrected) -350
322070 Three Sisters 20594 Confirmed Eruption 3 N & S flanks of South Sister (Devils Hill) Radiocarbon (uncorrected) -50
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.


Data from the Earthchem Library
Title Author Release Date DOI Link
The emissions of CO2 and other volatiles from the world’s subaerial volcanoes The emissions of CO2 and other volatiles from the world’s subaerial volcanoes Fischer, Tobias 2020-11-21 10.1594/IEDA/111445 Details
Data from the Earthchem Portal
Sorry. No data exist for this volcano in the EarthChem Portal.


Data from the SESAR Database


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