Tonga-Kermadec subduction system
E43916
The Tonga-Kermadec subduction system is a major convergent plate boundary in the southwest Pacific where the Pacific Plate descends beneath the Indo-Australian Plate, producing one of the world’s deepest ocean trenches and most active seismic and volcanic regions.
All labels observed (10)
How this entity was disambiguated
This entity first appeared as the object of triple T346068 — 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: Tonga-Kermadec subduction system Context triple: [Tonga Trench, associatedWith, Tonga-Kermadec subduction system]
-
A.
Sumatra subduction zone
The Sumatra subduction zone is a major convergent plate boundary off the western coast of Sumatra where intense seismic and volcanic activity occurs, including some of the world’s largest recorded earthquakes and tsunamis.
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B.
Cascadia Subduction Zone
The Cascadia Subduction Zone is a major convergent plate boundary off the Pacific Northwest coast of North America, capable of generating powerful megathrust earthquakes and tsunamis.
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C.
Peru–Chile Trench region
The Peru–Chile Trench region is a highly active subduction-zone area off the west coast of South America, known for its deep ocean trench, frequent earthquakes, and major role in Andean mountain building.
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D.
Japan Trench
The Japan Trench is a deep oceanic trench off northeastern Japan where the Pacific Plate subducts beneath the Okhotsk Plate, forming part of the Pacific Ring of Fire and generating powerful earthquakes and tsunamis.
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E.
Philippine Sea Plate
The Philippine Sea Plate is an oceanic tectonic plate in the western Pacific whose complex subduction zones and boundaries contribute significantly to the intense seismic and volcanic activity of the region.
- 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: Tonga-Kermadec subduction system Target entity description: The Tonga-Kermadec subduction system is a major convergent plate boundary in the southwest Pacific where the Pacific Plate descends beneath the Indo-Australian Plate, producing one of the world’s deepest ocean trenches and most active seismic and volcanic regions.
-
A.
Sumatra subduction zone
The Sumatra subduction zone is a major convergent plate boundary off the western coast of Sumatra where intense seismic and volcanic activity occurs, including some of the world’s largest recorded earthquakes and tsunamis.
-
B.
Cascadia Subduction Zone
The Cascadia Subduction Zone is a major convergent plate boundary off the Pacific Northwest coast of North America, capable of generating powerful megathrust earthquakes and tsunamis.
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C.
Peru–Chile Trench region
The Peru–Chile Trench region is a highly active subduction-zone area off the west coast of South America, known for its deep ocean trench, frequent earthquakes, and major role in Andean mountain building.
-
D.
Japan Trench
The Japan Trench is a deep oceanic trench off northeastern Japan where the Pacific Plate subducts beneath the Okhotsk Plate, forming part of the Pacific Ring of Fire and generating powerful earthquakes and tsunamis.
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E.
Philippine Sea Plate
The Philippine Sea Plate is an oceanic tectonic plate in the western Pacific whose complex subduction zones and boundaries contribute significantly to the intense seismic and volcanic activity of the region.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
convergent plate boundary
ⓘ
subduction zone ⓘ tectonic system ⓘ |
| associatedWith |
Tonga–Kermadec Arc
ⓘ
surface form:
Kermadec Ridge
Tonga Ridge ⓘ Tonga–Kermadec Arc ⓘ
surface form:
Tonga-Kermadec volcanic arc
Havre Trough ⓘ
surface form:
back-arc Havre Trough
back-arc Lau Basin ⓘ fluid release from subducting slab ⓘ mantle wedge melting ⓘ tsunami generation ⓘ |
| boundedBy |
Lau Basin to the west
ⓘ
Pacific Plate to the east ⓘ |
| characterizedBy | oceanic-oceanic subduction ⓘ |
| contains | Horizon Deep ⓘ |
| extendsFrom | northern Tonga region ⓘ |
| extendsTo | Kermadec region north of New Zealand ⓘ |
| hasFeature |
active volcanism
ⓘ
back-arc spreading centers ⓘ deep ocean trench ⓘ frequent large earthquakes ⓘ high plate convergence rate ⓘ high seismicity ⓘ slab rollback ⓘ steep subduction angle ⓘ submarine volcanoes ⓘ volcanic island arc ⓘ |
| hasMaximumDepth | over 10000 m ⓘ |
| hasOverridingPlate | Indo-Australian Plate ⓘ |
| hasPart |
Kermadec Trench
ⓘ
Tonga Trench ⓘ |
| hasSubductingPlate | Pacific Plate ⓘ |
| HorizonDeepDepthApprox | about 10800 m ⓘ |
| locatedIn | southwest Pacific Ocean ⓘ |
| near |
Kermadec Islands
ⓘ
Tonga ⓘ
surface form:
Tonga Islands
|
| oneOfWorlds |
deepest ocean trenches
ⓘ
most seismically active regions ⓘ most volcanically active regions ⓘ |
| overlies | Pacific Plate ⓘ |
| partOf | Pacific Ring of Fire ⓘ |
| produces |
deep-focus earthquakes
ⓘ
intermediate-depth earthquakes ⓘ megathrust earthquakes ⓘ |
| studiedIn |
marine geology
ⓘ
plate tectonics ⓘ seismology ⓘ volcanology ⓘ |
| underlies | Indo-Australian Plate ⓘ |
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: Tonga-Kermadec subduction system Description of subject: The Tonga-Kermadec subduction system is a major convergent plate boundary in the southwest Pacific where the Pacific Plate descends beneath the Indo-Australian Plate, producing one of the world’s deepest ocean trenches and most active seismic and volcanic regions.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Kermadec-Tonga subduction zone
this entity surface form:
Kermadec-Tonga subduction system
this entity surface form:
Kermadec-Havre-Tonga subduction system
this entity surface form:
Tonga–Kermadec subduction system
this entity surface form:
Kermadec subduction zone
subject surface form:
Lau Basin
this entity surface form:
Tonga-Kermadec subduction zone
subject surface form:
Lau Basin
this entity surface form:
Tonga-Lau back-arc system
this entity surface form:
Benioff zones
this entity surface form:
Kermadec–Tonga subduction system
this entity surface form:
Kermadec subduction zone