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Glaciated summit of Mount Hood rising above Oregon forests
Photo:Richard Fiske
Volcano Dossier•GVP #322010
45.37°N, 121.69°W
Historical eruption
United States→

Volcano Mount Hood

Oregon's highest peak stands about 80 km from Portland and is rated a 'very high threat' volcano by the USGS. Its last significant eruptions, in the late 1700s, sent mudflows down the Sandy River to the Columbia; today its glaciers feed the region's water supply, ski runs cover its flanks, and small earthquake swarms beneath it are a routine reminder that it is still active.

Last Eruption

1866

Historical eruption

Summit Elevation

3.4 km

Stratovolcano · Andesite / Basaltic Andesite

Seismic State

Normal Baseline

0 events (1.0x rate)

Interactive Volcano & Seismicity Map

Seismicity within 50 km radius, active VAAC ash plumes, and tectonic plate boundaries.

Recent seismicity within 50 km

0 events in the last 12 h within 25 km of the crater.

TimeMagnitudeEpicenter / PlaceDistance
7d agoM1.23 km S of Carson, Washington36 km
8d agoM0.86 km ENE of Government Camp, Oregon4.9 km
8d agoM0.98 km NNE of Government Camp, Oregon0.6 km
9d agoM1.16 km ENE of Government Camp, Oregon5.7 km
23d agoM0.89 km NNE of Government Camp, Oregon1.9 km
28d agoM0.16 km NE of Government Camp, Oregon4.1 km
31d agoM1.49 km NNE of Government Camp, Oregon0.9 km
35d agoM1.57 km NW of Mount Hood Village, Oregon28 km
40d agoM0.29 km NNE of Government Camp, Oregon0.3 km
40d agoM1.14 km ENE of Government Camp, Oregon6.1 km
40d agoM1.24 km ENE of Government Camp, Oregon6.1 km
46d agoM0.07 km ENE of Government Camp, Oregon5.3 km
47d agoM0.36 km NE of Government Camp, Oregon4.2 km
62d agoM0.93 km NW of Mount Hood Village, Oregon25 km
70d agoM0.18 km NNE of Government Camp, Oregon0.7 km
71d agoM0.28 km NE of Government Camp, Oregon0.6 km
89d agoM0.70 km N of Government Camp, Oregon8.4 km

Geological & Tectonic Profile

Stratovolcano

Mount Hood is an active Stratovolcano formed in an active Subduction zone / Continental crust (> 25 km). Dominant lithology: Andesite / Basaltic Andesite.

Edifice TypeStratovolcano
Major RockAndesite / Basaltic Andesite
Tectonic SettingSubduction zone
Volcanic ArcHigh Cascades Volcanic Arc

Volcanic Dossier

VN #322010

Official catalogue parameters, coordinates, elevation and geotectonic classification.

CountryUnited States
Crater Coordinates45.374°, -121.695°
Summit Elevation3.4 km
SubregionHigh Cascades Volcanic Arc
Catalog SourceSmithsonian GVP (#322010)

Authoritative Monitoring Infrastructure

All 18 Networks & VAAC →
Seismic ObservatoryUSGS VHP
USGS Volcano Hazards Program (HVO / CVO / AVO)
Official Portal
ICAO Aviation Ash Center
Washington VAAC (NOAA / NESDIS)
College Park, MD, USA
VAAC Advisory Desk
Swarm telemetry correlated across 18 networks against a 30-day baseline.Read Science & Physics →
Regional Seismic Profile

Cascadia & Pacific Northwest

Explore live seismic monitoring, historical danger benchmarks, fault slip models and recurrence intervals for Cascadia & Pacific Northwest.

Open Regional Hub

Frequently Asked Questions (FAQ)

Verified scientific, operational, and emergency protocols

The most recent eruption of Mount Hood recorded by the Smithsonian Global Volcanism Program was in 1866.

Catalogue: Smithsonian Institution, Global Volcanism Program.Smithsonian GVP profile