Alaska Volcano Observatory | Fourpeaked
Source: https://avo.alaska.edu/activity/Fourpeaked.php
Archived: 2026-04-23 17:15
Alaska Volcano Observatory |
Fourpeaked
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Fourpeaked
Description
Current Activity
Past Activity
Images
Maps
Bibliography
Prepare
Ash Forecasting
Facts
Official Name:
Fourpeaked Mountain
Seismically Monitored:
No
Color Code:
UNASSIGNED
Alert Level:
UNASSIGNED
Elevation:
2104m (6902ft)
Latitude:
58.7703
Longitude:
-153.6738
Smithsonian VNum:
312260
Pronunciation:
Your browser does not support the audio element.
Nearby Towns:
Port William 44 mi (71 km)
SE
Aleneva 59 mi (95 km)
SE
Kokhanok 60 mi (97 km)
NW
Afognak 62 mi (100 km)
SE
Pope-Vannoy Landing 62 mi (99 km)
NW
Distance from Anchorage: 213 mi (344 km)
Description
From Wood and Kienle (1990)
[1]
: "Fourpeaked Mountain consists of small isolated volcanic exposures surrounded by the Fourpeaked Glacier. The exposures are found along ridge crests and cliff faces on the sides of ridges that radiate out from the ice-covered summit. Lava flows are interlayered with volcanic agglomerate in the isolated exposures.
"Orientation of lava flows suggests the present summit of Fourpeaked is probably the vent for Fourpeaked volcano. Extensive hydrothermal alteration of rocks in this area is consistent with this vent location.
"Fourpeaked is known only from limited reconnaissance studies. The lavas are porphyritic andesite."
Name Origin
"Fourpeaked Mountain" is a descriptive name, transladed from "G[ora] Chetyrekglavaya" by George Davidson, U.S. Coast and Geodetic Survey. "Gora Chetyrekglavaya" means "four-headed mountain," and was published by Tebenkov in 1852. The Russian Hydrographic Department had previously published "G[ora] Chetyrekh," meaning "mountain of four heads" in 1847. This may be a mountain called "Saint Dolmat" on a 1748 Russian manuscript map (Wagner, 1937; Orth, 1971).
References Cited
[1]
Volcanoes of North America: United States and Canada
, 1990
Wood, C. A., and Kienle, Juergen, (eds.), 1990, Volcanoes of North America: United States and Canada: New York, Cambridge University Press, 354 p.
Current Activity
No new updates for Fourpeaked volcano since February 7, 2014, 3:45 pm.
Recent Updates
Fourpeaked Volcano has been moved to unassigned status.
Feb 7th, 2014 03:45:35 PM
Feb 7th, 2014 03:33:51 PM
Color Code Timeline
An explanation of color codes and alert levels can be found
here
.
Loading Past Activity...
Loading Images...
Loading Maps...
Loading Bibliography...
Before an eruption
Sign up for volcanic activty alerts from the Volcano Notification System (US Geological Survey)
Ashfall & Preparedness Information
Ashfall impacts & preparedness (US Geological Survey)
Volcanic health hazards & impacts (International Volcanic Health Hazards Network)
Ash Alert! Pamphlet (AK Division of Homeland Security & Emergency Management)
Volcanic Ashfall (AK Department of Environmental Conservation, Division of Air Quality)
During and After an Eruption
National Weather Service Ashfall Warnings are posted here when in effect
Alaska Division of Homeland Security and Emergency Management
Ted Stevens Airport Flight Status (Anchorage)
Fairbanks Airport Flight Status
Other Useful Links
Citizen Science: Ashfall collection instructions
Citizen Science: IS ASH FALLING? Report your observations (yes or no!)
Ash Forecasting
Mathematical models developed by the USGS forecast various aspects of how a volcanic ash plume will interact with wind—where, how high, and how fast ash particles will be transported in the atmosphere, as well as where ash will fall out and accumulate on the ground. AVO runs these models when a volcano is restless by assuming a reasonable hypothetical eruption, to provide a pre-eruptive forecast of areas likely to be affected. During an ongoing eruption, AVO will update the forecast with actual observations (eruption start time and duration, plume height) as they become available.
View the current airborne ash cloud models for Fourpeaked
Ashfall thickness forecast
The Ash3d model was developed by the USGS to forecast how a volcanic ash plume will interact with wind and where ash will fall out and accumulate on the ground. AVO runs these models twice daily when a volcano is restless by assuming a reasonable
hypothetical
eruption altitude and duration. The map shows the model results of ashfall thickness for areas that are likely to be affected, if one were to occur. During an ongoing eruption, AVO will update the forecast with actual observations (eruption start time and duration, plume height) as they become available, and these plots will be automatically updated. The
National Weather Service
Anchorage Forecast Office will issue the official ashfall warning product and post them at
weather.gov/afc
THESE PRODUCTS MAY NOT BE CURRENT.
During an actual eruption, see National Weather Service forecasts of ashfall:
https://weather.gov/afc
.
Ashfall Forecast
Click on the X on the graphic (upper right) to expand the map to show the map legend.
Ashfall Start Time
This map shows the modeled estimate of the time it would take for ashfall to begin following an eruption. It corresponds to the ashfall thickness forecast map shown above. This map uses the start time of either the twice-daily hypothetical model runs (time shown in the legend) or the actual eruption start time (if one were to occur). In the case of an actual eruption, the National Weather Service Anchorage Forecast Office will issue the official ashfall warning product that includes the ashfall start time and post them at
weather.gov/afc
THESE PRODUCTS MAY NOT BE CURRENT.
During an actual eruption, see National Weather Service forecasts of ashfall:
https://weather.gov/afc
.
Ashfall Start Times Forecast
Click on the X on the graphic (upper right) to expand the map to show the map legend.
USGS Volcano Notification Service
Contact AVO
Privacy
Accessibility
Information Quality
FOIA
This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G22AC00137 and G23AC00070.
Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.
×
Fourpeaked
Alaska Volcano Observatory
Home
Volcanoes
Webcams
Webcams
Ashcam GUI
News
Explore Data
Explore Data
References
Webicorder
Hazard Alert System
Eruptions
Geochem
Locations
Glossary
Images
Get Involved
About AVO
About AVO
Staff
Study Areas
Alert Levels
FAQ
Fourpeaked
Description
Current Activity
Past Activity
Images
Maps
Bibliography
Prepare
Ash Forecasting
Facts
Official Name:
Fourpeaked Mountain
Seismically Monitored:
No
Color Code:
UNASSIGNED
Alert Level:
UNASSIGNED
Elevation:
2104m (6902ft)
Latitude:
58.7703
Longitude:
-153.6738
Smithsonian VNum:
312260
Pronunciation:
Your browser does not support the audio element.
Nearby Towns:
Port William 44 mi (71 km)
SE
Aleneva 59 mi (95 km)
SE
Kokhanok 60 mi (97 km)
NW
Afognak 62 mi (100 km)
SE
Pope-Vannoy Landing 62 mi (99 km)
NW
Distance from Anchorage: 213 mi (344 km)
Description
From Wood and Kienle (1990)
[1]
: "Fourpeaked Mountain consists of small isolated volcanic exposures surrounded by the Fourpeaked Glacier. The exposures are found along ridge crests and cliff faces on the sides of ridges that radiate out from the ice-covered summit. Lava flows are interlayered with volcanic agglomerate in the isolated exposures.
"Orientation of lava flows suggests the present summit of Fourpeaked is probably the vent for Fourpeaked volcano. Extensive hydrothermal alteration of rocks in this area is consistent with this vent location.
"Fourpeaked is known only from limited reconnaissance studies. The lavas are porphyritic andesite."
Name Origin
"Fourpeaked Mountain" is a descriptive name, transladed from "G[ora] Chetyrekglavaya" by George Davidson, U.S. Coast and Geodetic Survey. "Gora Chetyrekglavaya" means "four-headed mountain," and was published by Tebenkov in 1852. The Russian Hydrographic Department had previously published "G[ora] Chetyrekh," meaning "mountain of four heads" in 1847. This may be a mountain called "Saint Dolmat" on a 1748 Russian manuscript map (Wagner, 1937; Orth, 1971).
References Cited
[1]
Volcanoes of North America: United States and Canada
, 1990
Wood, C. A., and Kienle, Juergen, (eds.), 1990, Volcanoes of North America: United States and Canada: New York, Cambridge University Press, 354 p.
Current Activity
No new updates for Fourpeaked volcano since February 7, 2014, 3:45 pm.
Recent Updates
Fourpeaked Volcano has been moved to unassigned status.
Feb 7th, 2014 03:45:35 PM
Feb 7th, 2014 03:33:51 PM
Color Code Timeline
An explanation of color codes and alert levels can be found
here
.
Loading Past Activity...
Loading Images...
Loading Maps...
Loading Bibliography...
Before an eruption
Sign up for volcanic activty alerts from the Volcano Notification System (US Geological Survey)
Ashfall & Preparedness Information
Ashfall impacts & preparedness (US Geological Survey)
Volcanic health hazards & impacts (International Volcanic Health Hazards Network)
Ash Alert! Pamphlet (AK Division of Homeland Security & Emergency Management)
Volcanic Ashfall (AK Department of Environmental Conservation, Division of Air Quality)
During and After an Eruption
National Weather Service Ashfall Warnings are posted here when in effect
Alaska Division of Homeland Security and Emergency Management
Ted Stevens Airport Flight Status (Anchorage)
Fairbanks Airport Flight Status
Other Useful Links
Citizen Science: Ashfall collection instructions
Citizen Science: IS ASH FALLING? Report your observations (yes or no!)
Ash Forecasting
Mathematical models developed by the USGS forecast various aspects of how a volcanic ash plume will interact with wind—where, how high, and how fast ash particles will be transported in the atmosphere, as well as where ash will fall out and accumulate on the ground. AVO runs these models when a volcano is restless by assuming a reasonable hypothetical eruption, to provide a pre-eruptive forecast of areas likely to be affected. During an ongoing eruption, AVO will update the forecast with actual observations (eruption start time and duration, plume height) as they become available.
View the current airborne ash cloud models for Fourpeaked
Ashfall thickness forecast
The Ash3d model was developed by the USGS to forecast how a volcanic ash plume will interact with wind and where ash will fall out and accumulate on the ground. AVO runs these models twice daily when a volcano is restless by assuming a reasonable
hypothetical
eruption altitude and duration. The map shows the model results of ashfall thickness for areas that are likely to be affected, if one were to occur. During an ongoing eruption, AVO will update the forecast with actual observations (eruption start time and duration, plume height) as they become available, and these plots will be automatically updated. The
National Weather Service
Anchorage Forecast Office will issue the official ashfall warning product and post them at
weather.gov/afc
THESE PRODUCTS MAY NOT BE CURRENT.
During an actual eruption, see National Weather Service forecasts of ashfall:
https://weather.gov/afc
.
Ashfall Forecast
Click on the X on the graphic (upper right) to expand the map to show the map legend.
Ashfall Start Time
This map shows the modeled estimate of the time it would take for ashfall to begin following an eruption. It corresponds to the ashfall thickness forecast map shown above. This map uses the start time of either the twice-daily hypothetical model runs (time shown in the legend) or the actual eruption start time (if one were to occur). In the case of an actual eruption, the National Weather Service Anchorage Forecast Office will issue the official ashfall warning product that includes the ashfall start time and post them at
weather.gov/afc
THESE PRODUCTS MAY NOT BE CURRENT.
During an actual eruption, see National Weather Service forecasts of ashfall:
https://weather.gov/afc
.
Ashfall Start Times Forecast
Click on the X on the graphic (upper right) to expand the map to show the map legend.
USGS Volcano Notification Service
Contact AVO
Privacy
Accessibility
Information Quality
FOIA
This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G22AC00137 and G23AC00070.
Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.
×