Mount St. Helens
E11819
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.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Mount St. Helens canonical | 24 |
| Mount St. Helens National Volcanic Monument | 11 |
| Mount St. Helens 1980 eruption | 1 |
| Mount St. Helens area | 1 |
| Mount St. Helens volcanic system | 1 |
| crater of Mount St. Helens | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T111072 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Mount St. Helens Context triple: [Cascade Volcanic Arc, hasVolcano, Mount St. Helens]
-
A.
Kamchatka volcanic arc
The Kamchatka volcanic arc is a highly active chain of volcanoes on Russia’s Kamchatka Peninsula, known for its frequent eruptions, numerous stratovolcanoes, and significant role in global volcanism and tectonics.
-
B.
Nevada Fall
Nevada Fall is a prominent and picturesque waterfall on the Merced River in Yosemite National Park, known for its powerful drop and dramatic granite surroundings.
-
C.
Mount Lyell
Mount Lyell is a prominent, glacier-clad peak in the Sierra Nevada of California, renowned as the tallest mountain in Yosemite National Park and a popular destination for experienced climbers.
-
D.
Half Dome
Half Dome is a famous granite rock formation in California known for its distinctive sheer face and popular but strenuous hiking and climbing routes.
-
E.
Mount Hood National Forest
Mount Hood National Forest is a vast federally managed forest in northern Oregon centered around the volcanic peak of Mount Hood, offering extensive outdoor recreation, scenic drives, and diverse mountain and forest ecosystems.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Mount St. Helens Target entity description: 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.
-
A.
Kamchatka volcanic arc
The Kamchatka volcanic arc is a highly active chain of volcanoes on Russia’s Kamchatka Peninsula, known for its frequent eruptions, numerous stratovolcanoes, and significant role in global volcanism and tectonics.
-
B.
Nevada Fall
Nevada Fall is a prominent and picturesque waterfall on the Merced River in Yosemite National Park, known for its powerful drop and dramatic granite surroundings.
-
C.
Mount Lyell
Mount Lyell is a prominent, glacier-clad peak in the Sierra Nevada of California, renowned as the tallest mountain in Yosemite National Park and a popular destination for experienced climbers.
-
D.
Gakkel Ridge
Gakkel Ridge is a slow-spreading mid-ocean ridge located beneath the Arctic Ocean, forming the tectonic boundary between the North American and Eurasian plates.
-
E.
Half Dome
Half Dome is a famous granite rock formation in California known for its distinctive sheer face and popular but strenuous hiking and climbing routes.
- F. None of above. chosen
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
|
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Mount St. Helens Description of subject: 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.
Referenced by (39)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Mount St. Helens National Volcanic Monument
this entity surface form:
Mount St. Helens National Volcanic Monument
this entity surface form:
Mount St. Helens National Volcanic Monument
this entity surface form:
Mount St. Helens 1980 eruption
this entity surface form:
Mount St. Helens National Volcanic Monument
this entity surface form:
Mount St. Helens National Volcanic Monument
this entity surface form:
Mount St. Helens National Volcanic Monument
this entity surface form:
crater of Mount St. Helens
this entity surface form:
Mount St. Helens volcanic system
this entity surface form:
Mount St. Helens National Volcanic Monument
this entity surface form:
Mount St. Helens area
this entity surface form:
Mount St. Helens National Volcanic Monument
this entity surface form:
Mount St. Helens National Volcanic Monument
this entity surface form:
Mount St. Helens National Volcanic Monument
this entity surface form:
Mount St. Helens National Volcanic Monument
subject surface form:
Washington (state)