Long Valley Caldera
E57336
Long Valley Caldera is a large volcanic depression in eastern California known for its geothermal activity, seismic unrest, and proximity to the Sierra Nevada and Mammoth Lakes.
All labels observed (12)
How this entity was disambiguated
This entity first appeared as the object of triple T420359 — 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: Long Valley Caldera Context triple: [Mammoth Lakes area, hasNearby, Long Valley Caldera]
-
A.
River Calder
The River Calder is a major river in West Yorkshire, England, flowing through several industrial towns before joining the River Aire.
-
B.
Medicine Lake Volcano
Medicine Lake Volcano is a large, shield-shaped volcano in northeastern California known for its extensive lava flows and location within the Cascade Volcanic Arc.
-
C.
Newberry Volcano
Newberry Volcano is a large shield-shaped volcanic complex in central Oregon known for its expansive caldera, numerous lava flows and cinder cones, and active geothermal features.
-
D.
Uzon caldera
Uzon caldera is a large volcanic depression in Russia’s Kamchatka Peninsula, renowned for its active geothermal features, hot springs, and diverse volcanic landscapes within the Kamchatka volcanic arc.
-
E.
Mount St. Helens
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.
- 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: Long Valley Caldera Target entity description: Long Valley Caldera is a large volcanic depression in eastern California known for its geothermal activity, seismic unrest, and proximity to the Sierra Nevada and Mammoth Lakes.
-
A.
River Calder
The River Calder is a major river in West Yorkshire, England, flowing through several industrial towns before joining the River Aire.
-
B.
Medicine Lake Volcano
Medicine Lake Volcano is a large, shield-shaped volcano in northeastern California known for its extensive lava flows and location within the Cascade Volcanic Arc.
-
C.
Newberry Volcano
Newberry Volcano is a large shield-shaped volcanic complex in central Oregon known for its expansive caldera, numerous lava flows and cinder cones, and active geothermal features.
-
D.
Uzon caldera
Uzon caldera is a large volcanic depression in Russia’s Kamchatka Peninsula, renowned for its active geothermal features, hot springs, and diverse volcanic landscapes within the Kamchatka volcanic arc.
-
E.
Mount St. Helens
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.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
caldera
ⓘ
supervolcano ⓘ volcanic depression ⓘ |
| approximateArea | about 450 square kilometers ⓘ |
| approximateLength | 32 kilometers ⓘ |
| approximateWidth | 17 kilometers ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| elevation | about 2,100–3,400 meters above sea level ⓘ |
| eruptionType | explosive ⓘ |
| formationCause | catastrophic explosive eruption ⓘ |
| geologicAge | Pleistocene ⓘ |
| geothermalDevelopmentArea | Casa Diablo power plants ⓘ |
| hasFeature |
Bishop Tuff
ⓘ
fumaroles ⓘ geothermal activity ⓘ hot springs ⓘ hydrothermal systems ⓘ resurgent dome ⓘ |
| hasNearbyFeature |
Casa Diablo geothermal field
ⓘ
Hot Creek Geological Site ⓘ
surface form:
Hot Creek geothermal area
Mammoth Lakes area ⓘ
surface form:
Mammoth Lakes
|
| hazardType |
ash-fall hazard
ⓘ
hydrothermal explosions ⓘ pyroclastic flows (in large eruptions) ⓘ volcanic gas emissions ⓘ |
| isSubjectOf |
geophysical research
ⓘ
volcano hazard assessments ⓘ volcanological studies ⓘ |
| lastMajorEruption | about 760,000 years ago ⓘ |
| lastMajorEruptionProduct | Bishop Tuff ⓘ |
| locatedIn |
Mono County, California
ⓘ
eastern California ⓘ |
| locatedNear |
Mammoth Lakes area
ⓘ
surface form:
Mammoth Lakes, California
Mammoth Mountain Ski Area ⓘ
surface form:
Mammoth Mountain
Sierra Nevada ⓘ |
| monitoredBy | USGS California Volcano Observatory ⓘ |
| monitoredFor |
gas emissions
ⓘ
ground deformation ⓘ seismic activity ⓘ |
| nearbyPopulationCenter |
Mammoth Lakes area
ⓘ
surface form:
Town of Mammoth Lakes
|
| overseenBy | United States Geological Survey ⓘ |
| partOf |
Basin and Range Province
ⓘ
Long Valley Caldera self-linksurface differs ⓘ
surface form:
Long Valley volcanic region
|
| riskLevel | potentially active volcano ⓘ |
| shows |
ground uplift episodes
ⓘ
seismic unrest ⓘ |
| tectonicSetting | extensional regime ⓘ |
| usedFor | geothermal power generation ⓘ |
| volcanicArcOrBelt |
Basin and Range Province
ⓘ
surface form:
Basin and Range extensional province
|
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: Long Valley Caldera Description of subject: Long Valley Caldera is a large volcanic depression in eastern California known for its geothermal activity, seismic unrest, and proximity to the Sierra Nevada and Mammoth Lakes.
Referenced by (27)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Long Valley Caldera (portion)
this entity surface form:
Mono–Inyo Craters
this entity surface form:
Long Valley volcanic region
subject surface form:
Eastern California
this entity surface form:
Long Valley near Mammoth Lakes
subject surface form:
Horseshoe Lake (Mammoth Lakes, California)
this entity surface form:
Long Valley Caldera region
subject surface form:
Palm Springs Aerial Tramway
this entity surface form:
Long Valley in the San Jacinto Mountains
this entity surface form:
Long Valley Caldera eruption
this entity surface form:
Long Valley volcanic system
this entity surface form:
Long Valley geothermal system
this entity surface form:
Long Valley Caldera magmatic system
this entity surface form:
Long Valley volcanic field
this entity surface form:
Long Valley volcanic region