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News
Saturday, Nov 11, 2006

Low-level earthquake activity continues at Fourpeaked volcano. Web camera views this past week show a typical steam plume rising several hundred meters above the summit.

... [more]
Aerialphoto of the summit of Fourpeaked volcano on an overflight on the 24th of Sep 2006 showing several steaming vents on its summit. (Photo courtesy: Cyrus Read, AVO/USGS)
Saturday, Feb 26, 2005

The first known historic eruption of Fourpeaked volcano on the Alaska peninsula is taking its course. Several vents emitting gasses and ash have appeared on the glacier-topped volcano and are slowly melting the ice cap.

... [more]
 

Fourpeaked volcano

Stratovolcano 2105 m / 6,906 ft
United States, Alaska Peninsula, 58.77°N / -153.67°W
Current status: dormant (1 out of 5) | Reports
Fourpeaked volcano books
Typical eruption style: unspecified
Fourpeaked volcano eruptions: 2006 
TimeMag. / DepthDistanceLocation
Sun, 15 Apr
Sun, 15 Apr 17:11 UTCM 1.8 / 4.2 km12 km- 115km SE of Old Iliamna, Alaska
Sun, 15 Apr 04:20 UTCM 1.3 / 4.3 km12 km- 116km SE of Old Iliamna, Alaska
Fri, 13 Apr
Fri, 13 Apr 05:54 UTCM 1.7 / 122.8 km39 km- 96km SSE of Old Iliamna, Alaska
Tue, 10 Apr
Tue, 10 Apr 05:25 UTCM 2.4 / 84.7 km11 km- 112km N of Larsen Bay, Alaska
Mon, 9 Apr
Mon, 9 Apr 21:07 UTCM 2.3 / 90.7 km6 km- 124km N of Larsen Bay, Alaska
View all recent quakes

Background:

Poorly known Fourpeaked volcano in NE Katmai National Park consists of isolated outcrops surrounded by the Fourpeaked Glacier, which descends eastward almost to the Shelikof Strait. The orientation of andesitic lava flows and extensive hydrothermal alteration of rocks near the present 2105-m-high summit suggest that it probably marks the vent of Fourpeaked volcano. Eruptive activity during the Holocene had not been confirmed prior to the first historical eruption of Fourpeaked in September 2006. A N-trending fissure extending 1 km from the summit produced minor ashfall.
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Smithsonian / GVP volcano information


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