Herbert
Stratovolcano in United States
Key Facts
Elevation
1,280 m (4,199 ft)
Type
Stratovolcano
Location
52.742°, -170.111°
Region
Aleutian Ridge Volcanic Arc
Rock Type
Andesite / Basaltic Andesite
Tectonic Setting
Subduction zone
Location
Loading map...
Overview
The 10-km-wide Herbert Island, the SW-most of the Islands of the Four Mountains group, lies across a strait SW of Mount Cleveland. This symmetrical stratovolcano has a summit truncated by a 2-km-wide caldera breached to NW. No historical eruptions have been recorded, and no geological studies have been published.
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: 311220
- •Evidence: Evidence Credible
- •Epoch: Holocene
About the Photo
Herbert is a cone containing a 2-km-wide summit caldera that opens to NW. This 23 June 1987 view from the WSW shows a small plume originating from Cleveland in background, with darkened slopes from ashfall produced during an eruption that began on 19 June.
Photo by Harold Wilson (Peninsula Airways), 1987 (courtesy of John Reeder, Alaska Div. Geology Geophysical Surveys).
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.