Okmok Caldera
E529420
Okmok Caldera is a large, historically active volcanic caldera in Alaska’s Aleutian Islands known for its explosive eruptions and extensive lava fields.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Okmok Caldera canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5583131 — 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: Okmok Caldera Context triple: [Umnak Island, hasVolcanicField, Okmok Caldera]
-
A.
Toya caldera
Toya caldera is a large volcanic caldera in Hokkaido, Japan, known for its scenic lake, hot springs, and frequent volcanic activity.
-
B.
Empakaai Crater
Empakaai Crater is a scenic volcanic caldera in northern Tanzania renowned for its deep soda lake, steep forested walls, and abundant birdlife within the Ngorongoro ecosystem.
-
C.
Tao-Rusyr Caldera
Tao-Rusyr Caldera is a large volcanic caldera and prominent geological feature located on Onekotan Island in Russia’s Kuril Island chain.
-
D.
Silverthrone Caldera
Silverthrone Caldera is a large, remote volcanic caldera and ice-covered massif in the Coast Mountains of British Columbia, Canada, known for its extensive glaciation and rugged terrain.
-
E.
Valley of Ten Thousand Smokes
The Valley of Ten Thousand Smokes is a vast ash-filled volcanic valley in Alaska famed for the dramatic landscape created by the 1912 Novarupta eruption.
- 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: Okmok Caldera Target entity description: Okmok Caldera is a large, historically active volcanic caldera in Alaska’s Aleutian Islands known for its explosive eruptions and extensive lava fields.
-
A.
Toya caldera
Toya caldera is a large volcanic caldera in Hokkaido, Japan, known for its scenic lake, hot springs, and frequent volcanic activity.
-
B.
Empakaai Crater
Empakaai Crater is a scenic volcanic caldera in northern Tanzania renowned for its deep soda lake, steep forested walls, and abundant birdlife within the Ngorongoro ecosystem.
-
C.
Tao-Rusyr Caldera
Tao-Rusyr Caldera is a large volcanic caldera and prominent geological feature located on Onekotan Island in Russia’s Kuril Island chain.
-
D.
Silverthrone Caldera
Silverthrone Caldera is a large, remote volcanic caldera and ice-covered massif in the Coast Mountains of British Columbia, Canada, known for its extensive glaciation and rugged terrain.
-
E.
Valley of Ten Thousand Smokes
The Valley of Ten Thousand Smokes is a vast ash-filled volcanic valley in Alaska famed for the dramatic landscape created by the 1912 Novarupta eruption.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
stratovolcano complex
ⓘ
volcanic caldera ⓘ |
| affects | aviation in North Pacific ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| eruptionStyle |
effusive
ⓘ
explosive ⓘ |
| eruptionYear |
1817
ⓘ
1919 ⓘ 1938 ⓘ 1945 ⓘ 1958 ⓘ 1997 ⓘ |
| formedBy | large explosive eruptions ⓘ |
| hasCalderaDiameter |
approximately 10 kilometers
ⓘ
approximately 6 miles ⓘ |
| hasFeature |
caldera lake (intermittent or ephemeral)
ⓘ
central cone complex ⓘ extensive lava fields ⓘ multiple cinder cones ⓘ tuff cones ⓘ |
| hasMonitoring |
infrasound sensors
ⓘ
satellite remote sensing ⓘ seismic network ⓘ web cameras ⓘ |
| hasRockType |
andesite
ⓘ
basalt ⓘ basaltic-andesitic lava ⓘ |
| hazardType |
ashfall
ⓘ
lahars ⓘ lava flows ⓘ pyroclastic flows ⓘ volcanic gas emissions ⓘ |
| isActive | true ⓘ |
| lastMajorEruption | 2008 ⓘ |
| locatedIn |
Alaska
ⓘ
Aleutian Islands NERFINISHED ⓘ Umnak Island NERFINISHED ⓘ United States of America ⓘ
surface form:
United States
|
| monitoredBy |
Alaska Volcano Observatory
NERFINISHED
ⓘ
United States Geological Survey NERFINISHED ⓘ |
| partOf |
Alaska Peninsula and Aleutian volcanic arc
NERFINISHED
ⓘ
Aleutian Arc NERFINISHED ⓘ |
| state | Alaska ⓘ |
| subductingPlate | Pacific Plate NERFINISHED ⓘ |
| tectonicPlate | North American Plate NERFINISHED ⓘ |
| tectonicSetting | subduction zone ⓘ |
| volcanicArc | Aleutian volcanic arc NERFINISHED ⓘ |
| volcanoType | shield-like caldera complex ⓘ |
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: Okmok Caldera Description of subject: Okmok Caldera is a large, historically active volcanic caldera in Alaska’s Aleutian Islands known for its explosive eruptions and extensive lava fields.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.