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Volcanoes of Washington State (12)

Glacier Peak | Goat Rocks | Indian Heaven | Marble Mountain | Mount Adams | Mount Baker | Mount Rainier | Mount St. Helens | Signal Peak | Simcoe | Tumac Mountain | West Crater
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Significant volcanic eruptions: Washington State

In historic times, at least 2 volcanoes have been active in Washington State, including Mount St. Helens and Mount Baker volcanoes. A total of 22 eruptions have been witnessed and documented since 1820.
The table below lists the most recent volcanic eruptions, significant eruptive episodes or related events in Washington State.
DateVolcanoVEIRegionDeathsDamage
2004 Oct 1 - 2008 Jan 27 ±10 d.Mount St. Helens
South of 1980-1986 lava dome
2Washington, USA
1990 Nov 5 - 1991 Feb 14Mount St. Helens
North side of lava dome
3?Washington, USA
1989 Dec 7 - 1990 Jan 6Mount St. Helens
North side of lava dome
2Washington, USA
1980 Mar 27 - 1986 Oct 28 ±3 d.Mount St. Helens
Summit and north flank
5Washington, USA
1980 May 18
(eruption 1980 Mar 27 - 1986 Oct 28 ±3 d.)
Mount St. Helens5Washington, USA61
catastrophic
Info
1880 Sep 7 - Nov 27Mount Baker
Sherman Crater
2United States
1870Mount Baker
Sherman Crater
2United States
1863 JulMount Baker
Sherman Crater
2United States
1859 Nov - 1860 Apr 26 ?Mount Baker
Sherman Crater
2United States
1858Mount Baker
Sherman Crater
2United States
1857 AprMount St. Helens2Washington, USA
1854 Feb - AprMount St. Helens
North flank
2Washington, USA
1854Mount Baker
Sherman Crater
2United States
1853 Mar 15 ±5 d. - AugMount St. Helens
North flank
2?Washington, USA
1852 Dec 1 ±30 d. - 1853 JanMount Baker
Sherman Crater
2United States
1850 Mar - MayMount St. Helens
North flank
2?Washington, USA
1848 Apr 1 or beforeMount St. Helens2?Washington, USA
1847 Mar 26 - Mar 30Mount St. Helens
North flank (Goat Rocks)
2Washington, USA
1842 Nov 22 - 1845 Sep 18 ?Mount St. Helens
North flank (Goat Rocks)
3Washington, USA
1843Mount Baker
Sherman Crater
3?United States
1835 MarMount St. Helens
North flank (Goat Rocks area)
2Washington, USA
1831 AugMount St. Helens
North Flank (Goat Rocks area)
3Washington, USA
1820 ?Mount Baker2United States
1800
(eruptive episode 1800 Jan 15)
Mount St. Helens5Washington, USA100-1,000 (*)
Info
(*) Estimated numbers
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

Washington State FAQ

+When was the last volcanic eruption in Washington State?

+When was the first documented volcanic eruption in Washington State?

+How often do volcanoes in Washington State erupt?

+How active are the volcanoes in Washington State?

+When was the largest volcanic eruption in Washington State?

Latest earthquakes: Washington State

In the past 7 days, Washington State has had 3 quakes of magnitude 2.0 or above. There were also 42 quakes below magnitude 2.0 which people don't normally feel.
A Magnitude 1.7 earthquake occurred in 6 km S of Gorst, Washington .
Magnitude 1.7 Earthquake 6 km S of Gorst, Washington -
Date and TimeMag / DepthNearest Volcano / Location
Apr 3, 05:27 pm (Universal Time)
1.7

19 km
99 km (62 mi) NW of6 km S of Gorst, Washington Info
Apr 2, 05:41 pm (GMT -7)
2.6

13 km
53 km (33 mi) NW of7 km WSW of Abbotsford, BC  I FELT IT - 2 reportsInfo
Wednesday, April 2, 2025 GMT (1 quake)
Apr 2, 03:58 pm (Universal Time)
2.1

32 km
205 km (127 mi) SW of29 km SSW of Port Renfrew, BC Info
Tuesday, April 1, 2025 GMT (1 quake)
Apr 1, 02:16 pm (Universal Time)
1.8

16 km
111 km (69 mi) NW of4 km WSW of Chico, Washington Info
Monday, March 31, 2025 GMT (1 quake)
Mar 31, 11:36 pm (Universal Time)
1.7

8.9 km
229 km (142 mi) SW of28 km WSW of Neah Bay, Washington Info
Friday, March 28, 2025 GMT (1 quake)
Mar 28, 01:32 pm (GMT -7)
2.5

0.5 km
175 km (109 mi) NW of16 km NNE of Amanda Park, Washington Info

Volcano List

Glacier Peak

(stratovolcano 3213 m / 10,541 ft)
Glacier Peak is a stratovolcano in northern Washington and the most remote of the Cascade volcanoes. Its name comes from the 11 glaciers on its flanks.
Although it reaches more than 10,000 feet elevation, the volcanic edifice is only 500-1000 m high, because the volcano's b... [more info]

Goat Rocks

(stratovolcano 2494 m / 8,182 ft)
Goat Rocks is the center a deeply eroded, glaciated volcanic center of a volcanic field 30 km (18 miles) north of Mount Adams, Washnington, USA. [more info]

Indian Heaven

(shield volcanoes 1806 m / 5,925 ft)
Indian Heaven volcano is a volcanic field 30 km halfway between Mt St. Helens and Mount Adams volcano, Washington, USA. It contains several low overlapping basaltic shield volcanoes and more than 50 flank vents with spatter cones primarily oriented along a N-S line.
The you... [more info]

Marble Mountain

(Shield 1255 m / 4117 ft)
[more info]

Mount Adams

(stratovolcano 3742 m / 12,277 ft)
Mt Adams stratovolcano 50 km east of Mt St Helens volcano is the by volume second largest volcano of the Cascades Range, after Mt. Shasta.
Mount Adams is the center of a 200 km3 volcanic field. The andesitic-dacitic volcano was built by several overlapping cones. It is elon... [more info]

Mount Baker

(stratovolcano 3285 m / 10,777 ft)
Mt Baker 50 km east of Bellingham, Washington, is the northernmost of Washington's volcanoes and one of the lesser known ones in the Cascade Range.
Mt Baker Volcano has been very active during the last centuries, but has been in repose now for more than 130 years.
Ear... [more info]

Mount Rainier

(stratovolcano 4329 m / 14,409 ft)
Mount Rainier, the highest peak in the Cascade Range, is located 87 km SE of Seattle and forms a majestic backdrop to the landscape of the region. The volcano is covered by 26 main glaciers, and melting of glacial ice by a future eruption causing lahars are a significant hazard f... [more info]

Mount St. Helens

(stratovolcano 2549 m / 8,363 ft)
Mount St Helens volcano hardly needs introduction. In its spectacular eruption in 1980, it placed itself deep into collective memory, in particular within the NW states of the USA. Prior to this eruption and its gradual reawakening, little attention had been given to the volcanic... [more info]

Signal Peak

(shield volcano 1555 m / 5,102 ft)
Signal Peak is the eroded remnant of a small andesitic stratovolcano overlying the southern part of the basaltic shield of the Lincoln Plateau.
Together with still active Mount Adams volcano to the west and the older Simcoe volcanic field of cinder cones to the east, it is ... [more info]

Simcoe

(volcanic field )
Simco volcanic field is a N-S aligned cluster of 24 monogenetic cinder cones. It is located E and SE of Mt Adams, Washington, California, near the town of Goldendale.
Associated is the younger basaltic Lincoln Plateau with Signal Peak at the western end of the field and ea... [more info]

Tumac Mountain

(Pyroclastic cone 1932 m / 6339 ft)
[more info]

West Crater

(volcanic field 1329 m / 4,360 ft)
West Crater volcano is a small andesitic lava dome with lava flows in southern Washington, belonging to a volcanic field extending from Marble Mountain, north of Swift Reservoir, to south of Trout Creek Hill. The field consists mainly of small basaltic and basaltic andesite cinde... [more info]
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Latest news
Wed, 9 Oct 2024, 14:00

Adams (United States) volcano - Smithsonian / USGS Weekly Volcanic Activity Report for 2 October-8 October 2024 (Continuing Activity)

The Cascades Volcano Observatory (CVO) issued an information statement about seismicity at Adams. In the month of September six locatable earthquakes with magnitudes of 0.9-2 were recorded by one seismic station located 11 km SW of the summit and others located much farther away. Typically, at Adams, one earthquake is recorded every 2-3 years. ... Read all
Tue, 31 Oct 2023, 06:49

Mount St. Helens volcano (Washington, USA): elevated seismic activity poses no threats so far

Digital elevation model of Mount St. Helens volcano and earthquake density during 1987-2004. Areas with a lot of earthquakes are in blue, while areas with fewer earthquakes are shown in oranges and browns. The earthquakes associated with the current episode are shown in orange (image: CVO)
The Cascades Volcano Observatory (CVO, USGS) reported that seismic activity at the volcano has been elevated over the past three months. ... Read all
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