World Map › St. Helens
Volcano
St. Helens
Stratovolcano · 2,549 m · United States of America
St. Helens sits on the North American Plate, in a subduction zone. 44 eruptions are known since the end of the last ice age, the most recent in 2008. Its major eruptions caused at least 61 deaths.
- Elevation
- 2,549 m
- Type
- Stratovolcano
- Tectonic Setting
- Subduction zone, continental crust
- Dominant Rock
- Dacite
- Plate
- North American Plate
- Country
- United States of America
- Last Eruption
- 2008
- Known Eruptions (Holocene)
- 44
- Max. Explosivity (VEI)
- 6
- Known Fatalities
- 61
Nearby Cities
Cities of more than 20,000 people within 100 km.
- 59 kmLongview66,000 people
- 73 kmVancouver526,000 people
- 85 kmPortland1,875,000 people
Eruption Timeline
Each bar is an eruption; its height shows its explosivity (VEI 0 to 8).
Eruption Deadly Eruption (NOAA) Uncertain Date
Sources : Global Volcanism Program, 2026. Volcanoes of the World (v. 5.4.0; 7 Aug 2026), Smithsonian Institution, doi:10.5479/si.GVP.VOTW5-2026.5.4 (volcano.si.edu) · NOAA NCEI · USGS · Wikidata