Bobrof
Stratovolcano in United States
Key Facts
Elevation
738 m (2,421 ft)
Type
Stratovolcano
Location
51.910°, -177.438°
Region
Aleutian Ridge Volcanic Arc
Rock Type
Basalt / Picro-Basalt
Tectonic Setting
Subduction zone
Location
Loading map...
Overview
The geology and timing of volcanism on this small uninhabited 3 x 4 km island, located in the Andreanof islands 50 km west of Adak and 15 km west of Kanaga volcano, are unknown (Coats, 1956). Apparent deposits of a massive submarine debris-avalanche deposit extend offshore to the NE. Smith et al.
(1978) considered Bobrof to be of possible Holocene age. Andesitic pyroclastic-flow deposits are present on the 738-m-high volcano.
Volcanic Hazards & Risk Assessment
Primary Hazards
- Pyroclastic flows
- Lava flows
- Volcanic bombs and ballistics
- Lahars and mudflows
Risk Level
Geological Composition & Structure
Rock Types
Tectonic Setting
Age & Formation
Eruption Statistics & Analysis
| Metric | Value | Global Ranking | Significance |
|---|---|---|---|
| Total Recorded Eruptions | Unknown | Low | Moderately active volcano |
| Maximum VEI | VEI Unknown | Minor | Local impact potential |
| Recent Activity | Unknown | Historical | Historically active |
Monitoring & Alert Status
Monitoring Networks
Current Status
Nearby Volcanoes in North America Volcanic Regions
Quick Info
- •Smithsonian ID: 311100
- •Evidence: Evidence Uncertain
- •Epoch: Holocene
About the Photo
The small 3 x 4 km Bobrof volcanic island lies 50 km W of Adak and 15 km W of Kanaga volcano. The irregular shoreline has a half-dozen small cliff-bound peninsulas. The geology and timing of volcanism on Bobrof are unknown, but pyroclastic flow deposits are present.
Photo courtesy of Alaska Volcano Observatory, U.S. Geological Survey.
Authority Sources
Related Volcanoes
Basic Information
This page shows basic data from the Smithsonian Global Volcanism Program. For more detailed information, visit the official Smithsonian page.