Grímsvötn volcano
E916872
Grímsvötn volcano is one of Iceland’s most active subglacial volcanoes, located beneath the Vatnajökull ice cap and known for its frequent explosive eruptions and associated glacial outburst floods (jökulhlaups).
All labels observed (2)
| Label | Occurrences |
|---|---|
| Grímsvötn | 1 |
| Grímsvötn volcano canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11281371 — 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: Grímsvötn volcano Context triple: [Vatnajökull National Park, contains, Grímsvötn volcano]
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A.
Öræfajökull volcanic system
The Öræfajökull volcanic system is a large ice-covered stratovolcano in southeast Iceland that forms part of Vatnajökull National Park and includes Iceland’s highest peak, Hvannadalshnúkur.
-
B.
Öræfajökull
Öræfajökull is a large ice-covered stratovolcano in southeast Iceland that forms part of Vatnajökull National Park and contains the country’s highest peak.
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C.
Fagradalsfjall volcanic area
Fagradalsfjall volcanic area is an active volcanic system on Iceland’s Reykjanes Peninsula known for its recent fissure eruptions and accessible lava fields that have drawn significant scientific and tourist interest.
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D.
Alaid Volcano
Alaid Volcano is a prominent, frequently active stratovolcano forming the northernmost and highest peak of Russia’s Kuril Islands.
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E.
Junnar
Junnar is an ancient town in Maharashtra, India, historically significant as a major urban and political center, including serving as a capital during the Satavahana dynasty.
- 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: Grímsvötn volcano Target entity description: Grímsvötn volcano is one of Iceland’s most active subglacial volcanoes, located beneath the Vatnajökull ice cap and known for its frequent explosive eruptions and associated glacial outburst floods (jökulhlaups).
-
A.
Öræfajökull volcanic system
The Öræfajökull volcanic system is a large ice-covered stratovolcano in southeast Iceland that forms part of Vatnajökull National Park and includes Iceland’s highest peak, Hvannadalshnúkur.
-
B.
Öræfajökull
Öræfajökull is a large ice-covered stratovolcano in southeast Iceland that forms part of Vatnajökull National Park and contains the country’s highest peak.
-
C.
Fagradalsfjall volcanic area
Fagradalsfjall volcanic area is an active volcanic system on Iceland’s Reykjanes Peninsula known for its recent fissure eruptions and accessible lava fields that have drawn significant scientific and tourist interest.
-
D.
Alaid Volcano
Alaid Volcano is a prominent, frequently active stratovolcano forming the northernmost and highest peak of Russia’s Kuril Islands.
-
E.
Junnar
Junnar is an ancient town in Maharashtra, India, historically significant as a major urban and political center, including serving as a capital during the Satavahana dynasty.
- F. None of above. chosen
Statements (53)
| Predicate | Object |
|---|---|
| instanceOf |
stratovolcano
ⓘ
subglacial volcano ⓘ volcano ⓘ |
| associatedWith |
Skeiðará river jökulhlaups
ⓘ
Skeiðarárjökull outlet glacier NERFINISHED ⓘ |
| country | Iceland ⓘ |
| coveredBy | Vatnajökull glacier NERFINISHED ⓘ |
| elevation | subglacial summit below ice surface ⓘ |
| eruptionConsequence |
large jökulhlaups on surrounding plains
ⓘ
rapid melting of overlying ice ⓘ sudden drainage of subglacial lakes ⓘ |
| eruptionFrequency | one of Iceland’s most active volcanoes ⓘ |
| eruptionStyle |
explosive eruptions
ⓘ
phreatomagmatic eruptions ⓘ subglacial eruptions ⓘ |
| eruptionYear |
1903
ⓘ
1922 ⓘ 1934 ⓘ 1983 ⓘ 1996 ⓘ 1998 ⓘ 2004 ⓘ 2011 ⓘ |
| hasCalderaDiameter | approximately 6–8 km ⓘ |
| hasFeature |
associated fissure swarms
ⓘ
central volcano ⓘ subglacial caldera ⓘ |
| hasLake | subglacial caldera lake ⓘ |
| hazard |
air traffic disruption
ⓘ
ash fall ⓘ glacial outburst floods ⓘ jökulhlaups ⓘ |
| iceCoverThickness | up to several hundred meters of ice ⓘ |
| lastEruption | May 2011 ⓘ |
| locatedIn |
Vatnajökull National Park
NERFINISHED
ⓘ
Vatnajökull ice cap NERFINISHED ⓘ southeast Iceland NERFINISHED ⓘ |
| meaningOfName | “Grímur’s lakes” or “masked lakes” ⓘ |
| monitoredBy |
Icelandic Civil Protection
NERFINISHED
ⓘ
Icelandic Meteorological Office NERFINISHED ⓘ |
| nameLanguage | Icelandic ⓘ |
| notableFor |
ash-producing eruptions
ⓘ
frequent eruptions ⓘ jökulhlaups ⓘ |
| partOf |
Iceland hotspot
ⓘ
Mid-Atlantic Ridge volcanic system NERFINISHED ⓘ |
| produces |
basaltic magma
ⓘ
tephra ⓘ volcanic ash clouds ⓘ |
| tectonicSetting |
Iceland plume
ⓘ
divergent plate boundary ⓘ |
| VEI | up to VEI 4–5 in historical eruptions ⓘ |
| volcanicZone | Eastern Volcanic Zone of Iceland NERFINISHED ⓘ |
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: Grímsvötn volcano Description of subject: Grímsvötn volcano is one of Iceland’s most active subglacial volcanoes, located beneath the Vatnajökull ice cap and known for its frequent explosive eruptions and associated glacial outburst floods (jökulhlaups).
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Grímsvötn