Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Fisher
This 1974 view shows part of the interior of Fisher caldera on Unimak Island in the eastern Aleutian Islands. Fisher is an 11 x 18 km caldera that formed about 9100 years ago during the eruption of compositionally zoned ash flows that overtopped topographic barriers more than 500 m in elevation. The caldera contains two large lakes and a smaller lake that drains through a notch in the south caldera rim. There has been one poorly documented historical eruption from Fisher in 1826. Photo by Tom Miller, 1974 (U.S. Geological Survey).
Volcano Number:311350
Volcano Name:Fisher
Country:United States
Volcano Type:Stratovolcano
Last Eruption:1830 CE
Elevation:1112m
Tectonic Setting:Subduction zone / Continental crust (> 25 km)
Pop. within 5km:0
Pop. within 10km:0
Pop. within 30km:0
Pop. within 100km:25
Latitude:54.65
Longitude:-164.43



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
311350 Fisher 20047 Confirmed Eruption 6 ? NE and SW parts of Fisher caldera Radiocarbon (uncorrected) -7420
311350 Fisher 20048 Confirmed Eruption 5 Turquoise cone Radiocarbon (uncorrected) -3170
311350 Fisher 20049 Confirmed Eruption Turquoise cone Radiocarbon (uncorrected) 400
311350 Fisher 20050 Confirmed Eruption Historical Observations 1795
311350 Fisher 20051 Confirmed Eruption 3 Mount Finch Historical Observations 1826/10/11 1827
311350 Fisher 20052 Confirmed Eruption 2 ? Mount Finch Historical Observations 1830
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
Field Report for the Collection of Mafic Tephra from the Aleutians Islands between Unimak and the Island of Four Mountains (Alaska, USA) Plank, Terry 2020-06-23 10.26022/IEDA/111584 Details
Bulk rock data for the central-eastern Aleutian volcanoes Rasmussen, Daniel 2021-02-09 10.26022/IEDA/111870 Details
Melt inclusion olivine-host data for the central-eastern Aleutian volcanoes Rasmussen, Daniel 2021-02-09 10.26022/IEDA/111871 Details
Melt inclusion data for the central-eastern Aleutian volcanoes Rasmussen, Daniel 2021-02-09 10.26022/IEDA/111873 Details
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.