Phlegraean Fields volcanic system
E182703
The Phlegraean Fields volcanic system is a large, active caldera complex near Naples in southern Italy, known for its intense geothermal activity, frequent unrest, and significant volcanic hazards.
All labels observed (19)
How this entity was disambiguated
This entity first appeared as the object of triple T1589154 — 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: Phlegraean Fields volcanic system Context triple: [Ischia, volcanicOrigin, Phlegraean Fields volcanic system]
-
A.
Phlegra
Phlegra is a legendary battlefield in Greek mythology, famed as the site of the epic struggle between the Olympian gods and the Giants.
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B.
Vesuvius
Vesuvius is an active stratovolcano near Naples in southern Italy, famous for its catastrophic AD 79 eruption that buried the Roman cities of Pompeii and Herculaneum.
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C.
Stromboli
Stromboli is an active volcanic island in the Tyrrhenian Sea, famous for its frequent mild eruptions that have earned it the nickname "Lighthouse of the Mediterranean."
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D.
Monte San Clemente
Monte San Clemente is an alternative name for Monte San Valentín, the highest peak in Chilean Patagonia and a prominent mountain in the Northern Patagonian Ice Field.
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E.
Mount Etna
Mount Etna is an active stratovolcano on the east coast of Sicily and one of the most active and iconic volcanoes in the world.
- 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: Phlegraean Fields volcanic system Target entity description: The Phlegraean Fields volcanic system is a large, active caldera complex near Naples in southern Italy, known for its intense geothermal activity, frequent unrest, and significant volcanic hazards.
-
A.
Phlegra
Phlegra is a legendary battlefield in Greek mythology, famed as the site of the epic struggle between the Olympian gods and the Giants.
-
B.
Vesuvius
Vesuvius is an active stratovolcano near Naples in southern Italy, famous for its catastrophic AD 79 eruption that buried the Roman cities of Pompeii and Herculaneum.
-
C.
Stromboli
Stromboli is an active volcanic island in the Tyrrhenian Sea, famous for its frequent mild eruptions that have earned it the nickname "Lighthouse of the Mediterranean."
-
D.
Monte San Clemente
Monte San Clemente is an alternative name for Monte San Valentín, the highest peak in Chilean Patagonia and a prominent mountain in the Northern Patagonian Ice Field.
-
E.
Mount Etna
Mount Etna is an active stratovolcano on the east coast of Sicily and one of the most active and iconic volcanoes in the world.
- F. None of above. chosen
Statements (66)
| Predicate | Object |
|---|---|
| instanceOf |
active volcanic system
ⓘ
caldera complex ⓘ supervolcano ⓘ |
| associatedWith | subduction of African Plate beneath Eurasian Plate ⓘ |
| CampanianIgnimbriteDepositType | ignimbrite ⓘ |
| CampanianIgnimbriteEruptionAge | about 39,000 years ago ⓘ |
| CampanianIgnimbriteMagnitude | M7.7 ⓘ |
| CampanianIgnimbriteVEI | 7 ⓘ |
| country | Italy ⓘ |
| exhibits |
gas emissions
ⓘ
ground uplift ⓘ seismic swarms ⓘ |
| extendsUnder |
Gulf of Pozzuoli
ⓘ
linked to:
Gulf of Naples
|
| gasComposition | CO2-rich fumarolic gases ⓘ |
| hasAlertLevelSystem | Italian Civil Protection volcanic alert levels ⓘ |
| hasCaldera |
Campi Flegrei caldera
ⓘ
linked to:
Phlegraean Fields volcanic system
|
| hasEruption |
Campanian Ignimbrite eruption
ⓘ
Neapolitan Yellow Tuff eruption ⓘ |
| hasFeature |
Agnano crater
ⓘ
La Solfatara fumarole field ⓘ Monte Nuovo ⓘ Pisciarelli fumarole field ⓘ
linked to:
Phlegraean Fields volcanic system
Pozzuoli Bay ⓘ
linked to:
Gulf of Naples
Solfatara crater ⓘ
linked to:
Agnano crater
fumaroles ⓘ hot springs ⓘ hydrothermal fields ⓘ mud pools ⓘ |
| hasPotentialHazard |
ash fall
ⓘ
gas emissions hazardous to life ⓘ ground deformation ⓘ lahars ⓘ phreatic explosions ⓘ pyroclastic flows ⓘ |
| hasUNESCOStatus | part of UNESCO World Heritage site "Historic Centre of Naples" buffer zone ⓘ |
| hazardLevel | high ⓘ |
| knownFor |
bradyseism
ⓘ
frequent unrest ⓘ intense geothermal activity ⓘ |
| lastEruption | 1538 ⓘ |
| lastEruptionFeature | Monte Nuovo ⓘ |
| lastEruptionType | phreatomagmatic eruption ⓘ |
| lastEruptionVEI | 3 ⓘ |
| locatedIn |
Campania
ⓘ
southern Italy ⓘ
linked to:
Southern Italy
|
| locatedNear | Naples ⓘ |
| locatedOn |
Bay of Naples
ⓘ
linked to:
Gulf of Naples
|
| monitoredBy |
Istituto Nazionale di Geofisica e Vulcanologia
ⓘ
Osservatorio Vesuviano ⓘ |
| nameLanguage | Greek ⓘ |
| nameMeaning | burning fields ⓘ |
| NeapolitanYellowTuffAge | about 15,000 years ago ⓘ |
| NeapolitanYellowTuffDepositType | welded tuff ⓘ |
| partlySubmerged | true ⓘ |
| partOf |
Campanian volcanic arc
ⓘ
linked to:
Apennine volcanic arc
Campanian volcanic province ⓘ
linked to:
Phlegraean Fields volcanic system
|
| populationExposed | hundreds of thousands of people ⓘ |
| posesRiskTo |
Bacoli
ⓘ
Naples metropolitan area ⓘ
linked to:
Naples
Pozzuoli ⓘ
linked to:
Puteoli
Quarto ⓘ |
| researchImportance | key natural laboratory for caldera unrest studies ⓘ |
| tectonicSetting | subduction-related volcanic arc ⓘ |
| tourism | geothermal tourism destination ⓘ |
| volcanicType |
caldera
ⓘ
ignimbrite 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: Phlegraean Fields volcanic system Description of subject: The Phlegraean Fields volcanic system is a large, active caldera complex near Naples in southern Italy, known for its intense geothermal activity, frequent unrest, and significant volcanic hazards.
Referenced by (33)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
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linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
subject linked to:
Portus Julius naval base
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system
linked to: Phlegraean Fields volcanic system