Aliso Canyon Oil Field
E373717
Aliso Canyon Oil Field is a major underground natural gas storage facility in Southern California, known for one of the largest methane leaks in U.S. history.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Aliso Canyon | 1 |
| Aliso Canyon Oil Field canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3622678 — 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: Aliso Canyon Oil Field Context triple: [Santa Susana Mountains, contains, Aliso Canyon Oil Field]
-
A.
Kern River Oil Field
Kern River Oil Field is one of California’s largest and oldest producing oil fields, located near Bakersfield in Kern County.
-
B.
1969 Santa Barbara oil spill
The 1969 Santa Barbara oil spill was a massive offshore drilling accident off the California coast that released millions of gallons of crude oil, devastating marine and coastal ecosystems and helping catalyze the modern U.S. environmental movement.
-
C.
Ridgecrest, California
Ridgecrest, California is a small Mojave Desert city in Kern County best known as the civilian community adjacent to the U.S. Navy’s China Lake Naval Air Weapons Station.
-
D.
Belridge Oil Field
Belridge Oil Field is one of California’s largest and most productive oil fields, located in the San Joaquin Valley and known for its extensive heavy oil and enhanced recovery operations.
-
E.
Elk Hills oil field
The Elk Hills oil field is a major petroleum reserve in California that gained historical notoriety for its central role in the Teapot Dome scandal, one of the most infamous corruption cases in U.S. political history.
- 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: Aliso Canyon Oil Field Target entity description: Aliso Canyon Oil Field is a major underground natural gas storage facility in Southern California, known for one of the largest methane leaks in U.S. history.
-
A.
Kern River Oil Field
Kern River Oil Field is one of California’s largest and oldest producing oil fields, located near Bakersfield in Kern County.
-
B.
1969 Santa Barbara oil spill
The 1969 Santa Barbara oil spill was a massive offshore drilling accident off the California coast that released millions of gallons of crude oil, devastating marine and coastal ecosystems and helping catalyze the modern U.S. environmental movement.
-
C.
Ridgecrest, California
Ridgecrest, California is a small Mojave Desert city in Kern County best known as the civilian community adjacent to the U.S. Navy’s China Lake Naval Air Weapons Station.
-
D.
Belridge Oil Field
Belridge Oil Field is one of California’s largest and most productive oil fields, located in the San Joaquin Valley and known for its extensive heavy oil and enhanced recovery operations.
-
E.
Elk Hills oil field
The Elk Hills oil field is a major petroleum reserve in California that gained historical notoriety for its central role in the Teapot Dome scandal, one of the most infamous corruption cases in U.S. political history.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
natural gas storage facility
ⓘ
oil and gas field ⓘ underground gas storage field ⓘ |
| affects |
Los Angeles regional electricity reliability
ⓘ
Southern California gas supply ⓘ |
| convertedToGasStorage | 1970s ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| discovered | 1930s ⓘ |
| environmentalImpact |
air quality concerns in Porter Ranch
ⓘ
large methane emissions ⓘ |
| gasTypeStored | methane-dominant natural gas ⓘ |
| hasApproximateStorageCapacity | over 80 billion cubic feet ⓘ |
| hasNumberOfWells | over 100 ⓘ |
| hasResource | natural gas ⓘ |
| hasType | underground depleted oil field converted to gas storage ⓘ |
| healthImpact | reports of headaches and nausea among nearby residents ⓘ |
| incident | Aliso Canyon gas leak ⓘ |
| incidentEndDate | 2016-02-18 ⓘ |
| incidentStartDate | 2015-10-23 ⓘ |
| locatedIn |
Los Angeles County, California
ⓘ
linked to:
Los Angeles County
Southern California ⓘ |
| locatedNear |
Porter Ranch, Los Angeles
ⓘ
linked to:
Porter Ranch
San Fernando Valley ⓘ |
| notableFor |
2015–2016 methane leak
ⓘ
one of the largest methane leaks in U.S. history ⓘ |
| operator | Southern California Gas Company ⓘ |
| ownedBy | Sempra Energy ⓘ |
| partOf | Southern California natural gas infrastructure ⓘ |
| rank | one of the largest gas storage fields in California ⓘ |
| regulator |
California Division of Oil, Gas, and Geothermal Resources
ⓘ
California Public Utilities Commission ⓘ |
| resultedIn |
lawsuits and settlements
ⓘ
regulatory investigations ⓘ stricter gas storage regulations in California ⓘ temporary relocation of thousands of residents ⓘ |
| safetyMeasuresAfterLeak |
enhanced well integrity testing
ⓘ
new monitoring and leak detection requirements ⓘ reduced operating pressure limits ⓘ |
| state |
California
ⓘ
linked to:
California, United States
|
| statusAfterLeak |
partially curtailed operations
ⓘ
subject to injection limits ⓘ |
| subjectOf |
debate about long-term closure
ⓘ
public controversy over safety ⓘ |
| usedFor |
natural gas storage
ⓘ
peak demand gas supply ⓘ regional energy reliability ⓘ |
| wellInvolved | SS-25 ⓘ |
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: Aliso Canyon Oil Field Description of subject: Aliso Canyon Oil Field is a major underground natural gas storage facility in Southern California, known for one of the largest methane leaks in U.S. history.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Aliso Canyon Oil Field