1977 San Juan earthquake
E911309
The 1977 San Juan earthquake was a powerful and destructive seismic event that struck the San Juan Province of western Argentina on November 23, 1977, causing significant damage and loss of life.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 1977 San Juan earthquake canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11217621 — 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: 1977 San Juan earthquake Context triple: [Western Argentina, hasNotableEarthquake, 1977 San Juan earthquake]
-
A.
1979 Petatlán earthquake
The 1979 Petatlán earthquake was a powerful seismic event that struck near Petatlán on Mexico’s Pacific coast, causing significant damage and casualties in the Guerrero region.
-
B.
1986 San Salvador earthquake
The 1986 San Salvador earthquake was a devastating magnitude 5.7 tremor that struck El Salvador’s capital region on October 10, 1986, causing widespread destruction and significant loss of life.
-
C.
1941 Guerrero earthquake
The 1941 Guerrero earthquake was a significant seismic event that struck the Mexican state of Guerrero, contributing to the region’s history of major earthquakes along the Pacific coast.
-
D.
1949 Ambato earthquake
The 1949 Ambato earthquake was a devastating seismic event in central Ecuador that caused widespread destruction and significant loss of life, particularly in the city of Ambato.
-
E.
1746 Lima–Callao earthquake
The 1746 Lima–Callao earthquake was a devastating seismic event in colonial Peru that destroyed much of Lima and the port of Callao and triggered a deadly tsunami, profoundly reshaping the region’s urban and architectural landscape.
- 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: 1977 San Juan earthquake Target entity description: The 1977 San Juan earthquake was a powerful and destructive seismic event that struck the San Juan Province of western Argentina on November 23, 1977, causing significant damage and loss of life.
-
A.
1979 Petatlán earthquake
The 1979 Petatlán earthquake was a powerful seismic event that struck near Petatlán on Mexico’s Pacific coast, causing significant damage and casualties in the Guerrero region.
-
B.
1986 San Salvador earthquake
The 1986 San Salvador earthquake was a devastating magnitude 5.7 tremor that struck El Salvador’s capital region on October 10, 1986, causing widespread destruction and significant loss of life.
-
C.
1941 Guerrero earthquake
The 1941 Guerrero earthquake was a significant seismic event that struck the Mexican state of Guerrero, contributing to the region’s history of major earthquakes along the Pacific coast.
-
D.
1949 Ambato earthquake
The 1949 Ambato earthquake was a devastating seismic event in central Ecuador that caused widespread destruction and significant loss of life, particularly in the city of Ambato.
-
E.
1746 Lima–Callao earthquake
The 1746 Lima–Callao earthquake was a devastating seismic event in colonial Peru that destroyed much of Lima and the port of Callao and triggered a deadly tsunami, profoundly reshaping the region’s urban and architectural landscape.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
earthquake
ⓘ
natural disaster ⓘ |
| aftershocks | multiple significant aftershocks in the following days ⓘ |
| casualties | 65 deaths ⓘ |
| category |
1977 disasters in Argentina
ⓘ
1977 earthquakes ⓘ Earthquakes in Argentina ⓘ History of San Juan Province, Argentina ⓘ |
| cause | subduction of the Nazca Plate beneath the South American Plate ⓘ |
| continent | South America ⓘ |
| country | Argentina ⓘ |
| countryAffected | Argentina ⓘ |
| countrySubdivisionAffected |
Mendoza Province
ⓘ
San Juan Province ⓘ |
| damage | severe structural damage in San Juan Province ⓘ |
| date | 1977-11-23 ⓘ |
| day | 23 ⓘ |
| depth_km | 17 ⓘ |
| epicenterRegion | near Caucete, San Juan Province ⓘ |
| injured | 300 ⓘ |
| intensityScale |
Mercalli intensity scale
ⓘ
linked to:
Mercalli
|
| isInCountry | Argentina ⓘ |
| localTime | 1977-11-23T06:23 ⓘ |
| location |
San Juan Province
ⓘ
western Argentina ⓘ |
| magnitude | 7.4 ⓘ |
| magnitudeType | moment magnitude scale ⓘ |
| maximumIntensity | IX (Violent) ⓘ |
| month | November ⓘ |
| naturalHazardType | seismic event ⓘ |
| notableFor | high level of destruction in San Juan Province ⓘ |
| occurredOnContinent | South America ⓘ |
| partOf | seismicity of the Andean region ⓘ |
| recordedBy | seismological agencies worldwide ⓘ |
| result |
building collapses
ⓘ
human casualties ⓘ infrastructure damage ⓘ |
| stronglyFeltIn |
La Rioja Province
ⓘ
Mendoza ⓘ
linked to:
Mendoza Province
San Juan ⓘ |
| tectonicSetting | Andean convergent margin ⓘ |
| timeZone | UTC−03:00 ⓘ |
| type | crustal earthquake ⓘ |
| year | 1977 ⓘ |
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: 1977 San Juan earthquake Description of subject: The 1977 San Juan earthquake was a powerful and destructive seismic event that struck the San Juan Province of western Argentina on November 23, 1977, causing significant damage and loss of life.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
western Argentina