Mount St. Helens

E11819
active volcano mountain natural landmark stratovolcano

Mount St. Helens is an active stratovolcano in Washington State, USA, best known for its catastrophic 1980 eruption that dramatically reshaped its summit and surrounding landscape.

Jump to: Surface forms Statements Referenced by

Observed surface forms (4)

Surface form Occurrences
Mount St. Helens National Volcanic Monument 6
Mount St. Helens 1980 eruption 1
Mount St. Helens volcanic system 1

Statements (50)

Predicate Object
instanceOf active volcano ⓘ
mountain ⓘ
natural landmark ⓘ
stratovolcano ⓘ
1980AshPlumeHeight about 15 miles ⓘ
about 24 kilometers ⓘ
1980Casualties 57 people killed ⓘ
1980Landslide largest debris avalanche in recorded history ⓘ
1980LateralBlastDirection north ⓘ
composition andesitic to dacitic lava ⓘ
country United States of America ⓘ
surface form: United States
discoveredByEuropeans George Vancouver ⓘ
distanceToPortland about 50 miles (80 km) northeast ⓘ
distanceToSeattle about 96 miles (155 km) south ⓘ
elevation approximately 2549 meters ⓘ
approximately 8363 feet ⓘ
eruptionVEI VEI 5 (1980 eruption) ⓘ
firstRecordedEuropeanSighting 1792 ⓘ
geologicalAge Holocene ⓘ
glacier Crater Glacier ⓘ
governedBy U.S. Forest Service ⓘ
surface form: United States Forest Service
lastEruption 2004–2008 ⓘ
locatedIn Cascade Range ⓘ
Pacific Northwest ⓘ
Skamania County, Washington ⓘ
surface form: Skamania County, Washington, United States

Washington ⓘ
surface form: Washington State
majorEruption May 18, 1980 ⓘ
monitoringAgency USGS Cascades Volcano Observatory ⓘ
surface form: Cascades Volcano Observatory

United States Geological Survey ⓘ
namedAfter Alleyne Fitzherbert, 1st Baron St Helens ⓘ
nearestMajorCity Portland, Oregon, United States ⓘ
surface form: Portland, Oregon

Seattle, Washington, United States ⓘ
surface form: Seattle, Washington
notableFeature extensive blast zone to the north ⓘ
lava dome complex in the crater ⓘ
rapid post-1980 ecological succession ⓘ
partOf Cascade Volcanic Arc ⓘ
Pacific Ring of Fire ⓘ
pre1980Elevation 2950 meters ⓘ
9677 feet ⓘ
prominence approximately 1340 meters ⓘ
protectedAreaDesignationYear 1982 ⓘ
region Pacific Northwest ⓘ
surface form: Pacific Northwest of the United States
state Washington ⓘ
summitCrater horseshoe-shaped crater open to the north ⓘ
volcanicHazards ashfall ⓘ
lahars ⓘ
lava domes ⓘ
pyroclastic flows ⓘ
volcanoType stratovolcano ⓘ
withinProtectedArea Mount St. Helens self-linksurface differs ⓘ
surface form: Mount St. Helens National Volcanic Monument

Referenced by (17)

Full triples — surface form annotated when it differs from this entity's canonical label.

Skamania County, Washington → contains → Mount St. Helens ⓘ
this entity surface form: Mount St. Helens National Volcanic Monument
Washington → contains → Mount St. Helens ⓘ
Southwest Washington → containsMountain → Mount St. Helens ⓘ
this entity surface form: Mount St. Helens National Volcanic Monument
Cascade Range → containsProtectedArea → Mount St. Helens ⓘ
this entity surface form: Mount St. Helens National Volcanic Monument
Cascade Volcanic Arc → hasVolcano → Mount St. Helens ⓘ
Crater Glacier → locatedIn → Mount St. Helens ⓘ
this entity surface form: Mount St. Helens National Volcanic Monument
Cowlitz County, Washington → locatedNear → Mount St. Helens ⓘ
Crater Glacier → namedAfter → Mount St. Helens ⓘ
this entity surface form: crater of Mount St. Helens
St. Helens, Oregon → namedAfter → Mount St. Helens ⓘ
this entity surface form: Mount St. Helens National Volcanic Monument
Cascade Range → notablePeak → Mount St. Helens ⓘ
Crater Glacier → partOf → Mount St. Helens ⓘ
this entity surface form: Mount St. Helens volcanic system
Bezymianny → similarTo → Mount St. Helens ⓘ
this entity surface form: Mount St. Helens 1980 eruption
Crater Glacier → surfaceFeatureOf → Mount St. Helens ⓘ
Mount St. Helens → withinProtectedArea → Mount St. Helens self-linksurface differs ⓘ
this entity surface form: Mount St. Helens National Volcanic Monument