Fourpeaked Volcano
Updated: Nov 25, 2025 12:18 GMT -
Stratovolcano
United States, Alaska Peninsula, 58.77°N / -153.67°W 
Summit height: 2105 m / 6,906 ft
Current status: normal or dormant (1 out of 5)
Last update: 10 Dec 2021 (Smithsonian / USGS Weekly Volcanic Activity Report)
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Fourpeaked volcano eruptions: 2006
Latest nearby earthquakes
| Date and Time | Mag / Depth | Distance / Location | |||
|---|---|---|---|---|---|
| Nov 24, 04:31 am (GMT -9) | 1.9 74 km | 18 km (11 mi) to the SW | 85 km NW of Aleneva, Alaska | Info | |
| Nov 24, 01:09 am (Universal Time) | 2.2 75 km | 22 km (13 mi) to the E | 88 km NNW of Aleneva, Alaska | Info | |
| Thursday, November 13, 2025 GMT (1 quake) | |||||
| Nov 12, 11:14 pm (Anchorage) | 2.0 58 km | 28 km (17 mi) to the SE | 63 km NNW of Aleneva, Alaska | Info | |
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.---
Smithsonian / GVP volcano information
Significant volcanic eruptions: Fourpeaked volcano
In the past 10,000 years, Fourpeaked has had only one confirmed historic eruption in 2006.
The table below lists all known eruptions (date in bold face) of Fourpeaked volcano in historic times and during the past 10,000 years. Updates on the most recent volcanic activity of Fourpeaked can be found on the news page of Fourpeaked volcano.
| Date | Note | VEI | Deaths | Damage | |
|---|---|---|---|---|---|
| Fissure trending N from summit Historical obs./docs. | 2 | ||||
Remark:
Our list of volcanic eruptions closely follows the database of eruptions of the Smithsonian's Global Volcanism Project (GVP), the internationally most recognized data source for volcanic eruptions, but also includes significant eruptive episodes or related volcano events. "Volcanic eruptions" are usually to be understood as sequences of individual eruptive episodes that can follow each other, or even overlap (if several vents are involved), and can last many years, decades or even longer. For example, the current activity of Stromboli volcano is understood as a single eruption that has been ongoing since 1934.
Sources: NOAA National Centers for Environmental Information (NCEI), Global Significant Volcanic Eruptions Database. doi:10.7289/V5TD9V7K | Global Volcanism Project / Smithsonian Institution
Fourpeaked Volcano FAQ
+When was the last eruption of Fourpeaked volcano?
The last confirmed eruption of Fourpeaked occurred in 2006.
+How often does Fourpeaked volcano erupt?
There are no known historic eruptions, but evidence from geologic records shows that it has had at least 1 eruptions over the past 10,000 years. This number is likely much higher because many past eruptions might not have left evidence recognizeable today and/or the volcano might not have been studied in too much detail. Using the available data, a very conservative estimate is that Fourpeaked volcano erupts every 10,000 years.
+How active is Fourpeaked volcano at present?
Fourpeaked volcano is occasionally active: Since 1900, it has had one eruption, which occurred in 2006.
+When was the largest eruption of Fourpeaked volcano?
The largest eruption of Fourpeaked volcano in historic times occurred in 2006. It ranks as a strombolian to vulcanian eruption with a magnitude 2 on the VEI (Volcanic Explosivity Index) scale.
Latest satellite images
Fourpeaked Volcano Maps
Below is a selection of maps showing the location and surroundings of the volcano at various resolutions based on aerial-imagery / terrain maps. Feel free to use them for non-commercial purposes on your blog or website as long as you credit them with a link back to this page (click to copy it).
Satellite/aerial-type map of Fourpeaked volcano (world scale)
Terrain-type map of Fourpeaked volcano (world scale)
Satellite/aerial-type map of Fourpeaked volcano (region scale large)
Terrain-type map of Fourpeaked volcano (region scale large)
Satellite/aerial-type map of Fourpeaked volcano (region scale medium)
Terrain-type map of Fourpeaked volcano (region scale medium)
Satellite/aerial-type map of Fourpeaked volcano (region scale small)
Terrain-type map of Fourpeaked volcano (region scale small)
Satellite/aerial-type map of Fourpeaked volcano (local scale large)
Terrain-type map of Fourpeaked volcano (local scale large)
Satellite/aerial-type map of Fourpeaked volcano (local scale medium)
Terrain-type map of Fourpeaked volcano (local scale medium)
Satellite/aerial-type map of Fourpeaked volcano (local scale small)
Terrain-type map of Fourpeaked volcano (local scale small)
Satellite/aerial-type map of Fourpeaked volcano (scale of 10s of km)
Terrain-type map of Fourpeaked volcano (scale of 10s of km)
Satellite/aerial-type map of Fourpeaked volcano (scale of 20-40 km)
Terrain-type map of Fourpeaked volcano (scale of 20-40 km)
Satellite/aerial-type map of Fourpeaked volcano (scale of approx. 10-20 km)
Terrain-type map of Fourpeaked volcano (scale of approx. 10-20 km)
Satellite/aerial-type map of Fourpeaked volcano (scale of 5-10 km)
Satellite/aerial-type map of Fourpeaked volcano (scale of few kilometers)
