1999 Düzce earthquake
E557393
The 1999 Düzce earthquake was a powerful and deadly magnitude 7.2 earthquake that struck northwestern Turkey, causing extensive destruction and loss of life just months after the devastating İzmit earthquake.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 1999 Düzce earthquake canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T5661238 — 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: 1999 Düzce earthquake Context triple: [North Anatolian Fault zone, notableEarthquake, 1999 Düzce earthquake]
-
A.
1992 Erzincan earthquake
The 1992 Erzincan earthquake was a powerful and destructive seismic event in eastern Turkey that caused significant loss of life and damage, highlighting the seismic risk along the North Anatolian Fault.
-
B.
1999 İzmit earthquake
The 1999 İzmit earthquake was a devastating magnitude 7.6 quake in northwestern Turkey that caused massive destruction and loss of life, and highlighted the seismic risk along the North Anatolian Fault.
-
C.
1939 Erzincan earthquake
The 1939 Erzincan earthquake was a devastating magnitude 7.8–8.0 seismic event in eastern Turkey that caused tens of thousands of deaths and marked one of the deadliest earthquakes in the country’s history.
-
D.
1944 Bolu–Gerede earthquake
The 1944 Bolu–Gerede earthquake was a major and destructive seismic event in northern Turkey that ruptured a long segment of the North Anatolian Fault and caused extensive damage and loss of life.
-
E.
1943 Tosya–Ladik earthquake
The 1943 Tosya–Ladik earthquake was a powerful and destructive seismic event in northern Turkey that ruptured a major segment of the North Anatolian Fault and caused extensive damage and loss of life.
- 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: 1999 Düzce earthquake Target entity description: The 1999 Düzce earthquake was a powerful and deadly magnitude 7.2 earthquake that struck northwestern Turkey, causing extensive destruction and loss of life just months after the devastating İzmit earthquake.
-
A.
1992 Erzincan earthquake
The 1992 Erzincan earthquake was a powerful and destructive seismic event in eastern Turkey that caused significant loss of life and damage, highlighting the seismic risk along the North Anatolian Fault.
-
B.
1999 İzmit earthquake
The 1999 İzmit earthquake was a devastating magnitude 7.6 quake in northwestern Turkey that caused massive destruction and loss of life, and highlighted the seismic risk along the North Anatolian Fault.
-
C.
1939 Erzincan earthquake
The 1939 Erzincan earthquake was a devastating magnitude 7.8–8.0 seismic event in eastern Turkey that caused tens of thousands of deaths and marked one of the deadliest earthquakes in the country’s history.
-
D.
1944 Bolu–Gerede earthquake
The 1944 Bolu–Gerede earthquake was a major and destructive seismic event in northern Turkey that ruptured a long segment of the North Anatolian Fault and caused extensive damage and loss of life.
-
E.
1943 Tosya–Ladik earthquake
The 1943 Tosya–Ladik earthquake was a powerful and destructive seismic event in northern Turkey that ruptured a major segment of the North Anatolian Fault and caused extensive damage and loss of life.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf | earthquake ⓘ |
| aftershocks | numerous strong aftershocks ⓘ |
| casualties | over 800 deaths ⓘ |
| category |
1999 disasters in Turkey
ⓘ
Earthquakes in Turkey ⓘ |
| country | Turkey ⓘ |
| damage |
building collapses in Bolu Province
ⓘ
infrastructure damage in northwestern Turkey ⓘ severe structural damage in Düzce ⓘ |
| date | 1999-11-12 ⓘ |
| depth | about 15 km ⓘ |
| displacedPeople | tens of thousands displaced ⓘ |
| economicLosses | billions of US dollars ⓘ |
| epicenter | near Düzce, Turkey ⓘ |
| fault |
North Anatolian Fault
ⓘ
linked to:
North Anatolian Fault zone
|
| injuries | thousands of injuries ⓘ |
| intensityScale | Modified Mercalli intensity scale ⓘ |
| internationalAidFrom |
European Union
ⓘ
Greece ⓘ United States ⓘ
linked to:
United States of America
|
| ledTo |
increased seismic awareness in Turkey
ⓘ
revisions of Turkish building codes ⓘ |
| localTime | 18:57 ⓘ |
| location |
Düzce
ⓘ
northwestern Turkey ⓘ |
| magnitude | 7.2 ⓘ |
| magnitudeScale | moment magnitude scale ⓘ |
| maximumIntensity | IX (Violent) ⓘ |
| maximumSurfaceDisplacement | about 5 meters ⓘ |
| notableConsequence |
collapse of many reinforced-concrete buildings
ⓘ
widespread homelessness in Düzce ⓘ |
| occurredMonthsAfter | 1999 İzmit earthquake ⓘ |
| partOf | sequence of large earthquakes along the North Anatolian Fault in the 20th century ⓘ |
| region | Marmara Region ⓘ |
| relatedEvent | 1999 İzmit earthquake ⓘ |
| ruptureLength | approximately 40 km ⓘ |
| sameFaultSystemAs | 1999 İzmit earthquake ⓘ |
| strongestShakingArea |
Düzce city center
ⓘ
linked to:
Düzce
|
| strongShakingAlsoFeltIn |
Ankara
ⓘ
Bolu ⓘ Istanbul ⓘ |
| tectonicSetting | strike-slip faulting ⓘ |
| timeBetweenMainEvents | about three months after the İzmit earthquake ⓘ |
| triggeredEmergencyResponseBy | Government of Turkey ⓘ |
| typeOfRupture | right-lateral strike-slip ⓘ |
| utcTime | 16:57 ⓘ |
| year | 1999 ⓘ |
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: 1999 Düzce earthquake Description of subject: The 1999 Düzce earthquake was a powerful and deadly magnitude 7.2 earthquake that struck northwestern Turkey, causing extensive destruction and loss of life just months after the devastating İzmit earthquake.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.