San Jacinto Fault Zone
E63190
The San Jacinto Fault Zone is a major active strike-slip fault system in Southern California that accommodates a significant portion of the region’s tectonic motion and poses substantial earthquake hazard.
All labels observed (5)
| Label | Occurrences |
|---|---|
| San Jacinto Fault Zone canonical | 10 |
| San Jacinto Fault | 1 |
| San Jacinto strike-slip fault system | 1 |
| San Jacinto–Elsinore fault region | 1 |
| influenced by San Jacinto Fault Zone | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T506403 — 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: San Jacinto Fault Zone Context triple: [Transverse Ranges, crossedBy, San Jacinto Fault Zone]
-
A.
Heezen Fault Zone
The Heezen Fault Zone is a major undersea geological fault system named in honor of American oceanographer Bruce C. Heezen, recognized for his pioneering work in mapping the ocean floor.
-
B.
San Andreas Fault
The San Andreas Fault is a major tectonic boundary in California where the Pacific and North American plates meet, notorious for generating powerful earthquakes.
-
C.
Queen Charlotte Fault
The Queen Charlotte Fault is a major transform fault off the Pacific Northwest coast that marks the tectonic boundary between the Pacific and North American Plates and is a significant source of earthquakes in the region.
-
D.
Southern Uplands Fault
The Southern Uplands Fault is a major geological fault line in Scotland that marks the boundary between the Central Lowlands and the Southern Uplands, playing a key role in the region’s tectonic and landscape history.
-
E.
Gulf of California rift zone
The Gulf of California rift zone is an active tectonic region where continental crust is being stretched and thinned, linking the San Andreas Fault system to seafloor spreading centers in the eastern Pacific.
- 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: San Jacinto Fault Zone Target entity description: The San Jacinto Fault Zone is a major active strike-slip fault system in Southern California that accommodates a significant portion of the region’s tectonic motion and poses substantial earthquake hazard.
-
A.
Heezen Fault Zone
The Heezen Fault Zone is a major undersea geological fault system named in honor of American oceanographer Bruce C. Heezen, recognized for his pioneering work in mapping the ocean floor.
-
B.
San Andreas Fault
The San Andreas Fault is a major tectonic boundary in California where the Pacific and North American plates meet, notorious for generating powerful earthquakes.
-
C.
Queen Charlotte Fault
The Queen Charlotte Fault is a major transform fault off the Pacific Northwest coast that marks the tectonic boundary between the Pacific and North American Plates and is a significant source of earthquakes in the region.
-
D.
Southern Uplands Fault
The Southern Uplands Fault is a major geological fault line in Scotland that marks the boundary between the Central Lowlands and the Southern Uplands, playing a key role in the region’s tectonic and landscape history.
-
E.
Gulf of California rift zone
The Gulf of California rift zone is an active tectonic region where continental crust is being stretched and thinned, linking the San Andreas Fault system to seafloor spreading centers in the eastern Pacific.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
geologic fault
ⓘ
plate boundary fault ⓘ strike-slip fault zone ⓘ |
| accommodates | significant portion of Pacific–North American plate motion ⓘ |
| age | Late Cenozoic ⓘ |
| associatedWith | San Jacinto Mountains uplift ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| deformationStyle | brittle crustal faulting ⓘ |
| discovered | late 19th century ⓘ |
| displacementRate | about 10–20 millimeters per year ⓘ |
| earthquakeHistory | numerous moderate to strong earthquakes in historic time ⓘ |
| earthquakePotential | large damaging earthquakes ⓘ |
| formsBoundaryBetween | San Jacinto Mountains and Inland valleys ⓘ |
| hazard | major earthquake hazard in Southern California ⓘ |
| length |
approximately 130 miles
ⓘ
approximately 210 kilometers ⓘ |
| locatedIn | Southern California ⓘ |
| maximumMagnitudeEstimate | around magnitude 7.5 ⓘ |
| monitoredBy |
California Integrated Seismic Network
ⓘ
surface form:
Southern California Seismic Network
United States Geological Survey ⓘ |
| motionType | right-lateral strike-slip ⓘ |
| namedAfter | San Jacinto Mountains ⓘ |
| notableEarthquake |
1918 San Jacinto earthquake
ⓘ
1937 Terwilliger Valley earthquake ⓘ 1968 Borrego Mountain earthquake ⓘ 1987 Superstition Hills earthquake sequence ⓘ |
| orientation | northwest–southeast ⓘ |
| parallelTo | San Andreas Fault ⓘ |
| partOf | San Andreas fault system ⓘ |
| passesNear |
Anza Valley
ⓘ
surface form:
Anza
Hemet ⓘ Riverside ⓘ San Bernardino ⓘ San Jacinto, California ⓘ |
| plateBoundaryType | transform ⓘ |
| region |
Inland Empire
ⓘ
Peninsular Ranges ⓘ |
| relativeSlipRate | one of the fastest-slipping faults in Southern California ⓘ |
| riskTo | densely populated areas of Southern California ⓘ |
| segment |
Anza segment
ⓘ
Borrego segment ⓘ Clark segment ⓘ Coyote Creek (Santa Clara County) ⓘ
surface form:
Coyote Creek segment
San Bernardino segment ⓘ San Jacinto Valley ⓘ
surface form:
San Jacinto Valley segment
Superstition Mountain segment ⓘ |
| seismicActivity | high ⓘ |
| tectonicRole | accommodates part of shear between Pacific and North American plates ⓘ |
| tectonicSetting |
Pacific–North American plate boundary system
ⓘ
surface form:
Pacific–North American plate boundary
|
| terminatesNear | Imperial Valley ⓘ |
| trend | northwest ⓘ |
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: San Jacinto Fault Zone Description of subject: The San Jacinto Fault Zone is a major active strike-slip fault system in Southern California that accommodates a significant portion of the region’s tectonic motion and poses substantial earthquake hazard.
Referenced by (14)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
influenced by San Jacinto Fault Zone
this entity surface form:
San Jacinto strike-slip fault system
this entity surface form:
San Jacinto–Elsinore fault region
this entity surface form:
San Jacinto Fault