Mount Okmok
E539114
Mount Okmok is a large volcanic caldera on Alaska’s Aleutian Islands known for its explosive eruptions and significant impact on regional and even global climate.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mount Okmok canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5583127 — 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 Okmok Context triple: [Umnak Island, hasVolcano, Mount Okmok]
-
A.
Mount Veniaminof
Mount Veniaminof is an active stratovolcano and massive ice-covered volcanic complex located on the Alaska Peninsula, known for its large caldera and frequent eruptions.
-
B.
Mount Aniakchak
Mount Aniakchak is a massive volcanic caldera on the Alaska Peninsula known for its remote wilderness, dramatic geology, and status as part of the Aniakchak National Monument and Preserve.
-
C.
Mount Pavlof
Mount Pavlof is one of Alaska’s most active stratovolcanoes, located near the eastern end of the Aleutian volcanic arc.
-
D.
Mount Chiginagak
Mount Chiginagak is an active stratovolcano on the Alaska Peninsula known for its geothermal activity and potential for explosive eruptions.
-
E.
Shishaldin Volcano
Shishaldin Volcano is a highly symmetrical, frequently active stratovolcano on Unimak Island in Alaska, known as one of the most prominent volcanic peaks in the Aleutian chain.
- 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 Okmok Target entity description: Mount Okmok is a large volcanic caldera on Alaska’s Aleutian Islands known for its explosive eruptions and significant impact on regional and even global climate.
-
A.
Mount Veniaminof
Mount Veniaminof is an active stratovolcano and massive ice-covered volcanic complex located on the Alaska Peninsula, known for its large caldera and frequent eruptions.
-
B.
Mount Aniakchak
Mount Aniakchak is a massive volcanic caldera on the Alaska Peninsula known for its remote wilderness, dramatic geology, and status as part of the Aniakchak National Monument and Preserve.
-
C.
Mount Pavlof
Mount Pavlof is one of Alaska’s most active stratovolcanoes, located near the eastern end of the Aleutian volcanic arc.
-
D.
Mount Chiginagak
Mount Chiginagak is an active stratovolcano on the Alaska Peninsula known for its geothermal activity and potential for explosive eruptions.
-
E.
Shishaldin Volcano
Shishaldin Volcano is a highly symmetrical, frequently active stratovolcano on Unimak Island in Alaska, known as one of the most prominent volcanic peaks in the Aleutian chain.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
shield volcano
ⓘ
volcanic caldera ⓘ |
| associatedWith | possible link to global climate anomalies around 43–41 BCE ⓘ |
| calderaDiameter |
approximately 10 kilometers
ⓘ
approximately 6 miles ⓘ |
| climateImpact |
regional climate cooling
ⓘ
stratospheric sulfate aerosol injection ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| elevation |
approximately 1530 meters
ⓘ
approximately 5020 feet ⓘ |
| eruptionFrequency | multiple historical eruptions in the 19th and 20th centuries ⓘ |
| eruptionProduct |
andesitic tephra
ⓘ
basaltic lava ⓘ volcanic ash ⓘ |
| eruptionStyle |
explosive
ⓘ
phreatomagmatic ⓘ strombolian ⓘ |
| geologicalAge | Quaternary ⓘ |
| hasCaldera | Okmok Caldera NERFINISHED ⓘ |
| hasCalderaFloorElevation | approximately 400 meters above sea level ⓘ |
| hasCrater | multiple post-caldera cones and craters ⓘ |
| hasFeature |
lava flows filling parts of the caldera floor
ⓘ
scoria cones ⓘ tuff cones ⓘ |
| hazardType |
ashfall
ⓘ
lahars ⓘ pyroclastic flows ⓘ volcanic gas emissions ⓘ |
| includedIn | Global Volcanism Program database NERFINISHED ⓘ |
| isActive | true ⓘ |
| islandVolcano | true ⓘ |
| lastEruption | 2008 ⓘ |
| locatedIn |
Alaska
ⓘ
Aleutian Islands NERFINISHED ⓘ Aleutians West Census Area NERFINISHED ⓘ North Pacific Ocean NERFINISHED ⓘ Umnak Island NERFINISHED ⓘ |
| monitoredBy |
Alaska Volcano Observatory
NERFINISHED
ⓘ
United States Geological Survey NERFINISHED ⓘ |
| mountainRange | Aleutian Range NERFINISHED ⓘ |
| nearbySettlement | Nikolski, Alaska NERFINISHED ⓘ |
| notableEruption |
2008 Okmok eruption
NERFINISHED
ⓘ
43 BCE Okmok caldera-forming eruption ⓘ |
| partOf |
Alaska Peninsula and Aleutian volcanic arc
NERFINISHED
ⓘ
Aleutian Arc NERFINISHED ⓘ |
| tectonicSetting | subduction of the Pacific Plate beneath the North American Plate ⓘ |
| volcanicExplosivityIndex | up to VEI 6 in prehistoric eruptions ⓘ |
| volcanoNumber | 311240 ⓘ |
| volcanoType | shield volcano with summit caldera ⓘ |
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 Okmok Description of subject: Mount Okmok is a large volcanic caldera on Alaska’s Aleutian Islands known for its explosive eruptions and significant impact on regional and even global climate.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.