2019 Ridgecrest earthquakes
E209361
The 2019 Ridgecrest earthquakes were a powerful sequence of Southern California quakes, including a magnitude 7.1 mainshock, that caused widespread shaking, surface ruptures, and infrastructure damage across the Mojave Desert region.
All labels observed (2)
| Label | Occurrences |
|---|---|
| 2019 Ridgecrest earthquakes canonical | 1 |
| 2019 Ridgecrest mainshock | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1878129 — 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: 2019 Ridgecrest earthquakes Context triple: [Ridgecrest, California, notableEvent, 2019 Ridgecrest earthquakes]
-
A.
1992 Cape Mendocino earthquakes
The 1992 Cape Mendocino earthquakes were a sequence of powerful offshore quakes near Northern California that caused significant shaking, damage, and a small tsunami along the Pacific coast.
-
B.
1989 Loma Prieta earthquake
The 1989 Loma Prieta earthquake was a powerful magnitude 6.9 quake in Northern California that caused widespread damage in the San Francisco Bay Area, including freeway collapses and the disruption of the World Series.
-
C.
1185 Lincoln earthquake
The 1185 Lincoln earthquake was a significant medieval seismic event in England that caused extensive damage in the city of Lincoln and led to major reconstruction of Lincoln Cathedral.
-
D.
1906 San Francisco earthquake
The 1906 San Francisco earthquake was a devastating magnitude 7.8 seismic event that struck Northern California, causing widespread destruction and fires that nearly leveled San Francisco and became one of the worst natural disasters in U.S. history.
-
E.
Quakes
Quakes is the commonly used nickname for the Major League Soccer club San Jose Earthquakes.
- 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: 2019 Ridgecrest earthquakes Target entity description: The 2019 Ridgecrest earthquakes were a powerful sequence of Southern California quakes, including a magnitude 7.1 mainshock, that caused widespread shaking, surface ruptures, and infrastructure damage across the Mojave Desert region.
-
A.
1992 Cape Mendocino earthquakes
The 1992 Cape Mendocino earthquakes were a sequence of powerful offshore quakes near Northern California that caused significant shaking, damage, and a small tsunami along the Pacific coast.
-
B.
1989 Loma Prieta earthquake
The 1989 Loma Prieta earthquake was a powerful magnitude 6.9 quake in Northern California that caused widespread damage in the San Francisco Bay Area, including freeway collapses and the disruption of the World Series.
-
C.
1185 Lincoln earthquake
The 1185 Lincoln earthquake was a significant medieval seismic event in England that caused extensive damage in the city of Lincoln and led to major reconstruction of Lincoln Cathedral.
-
D.
1906 San Francisco earthquake
The 1906 San Francisco earthquake was a devastating magnitude 7.8 seismic event that struck Northern California, causing widespread destruction and fires that nearly leveled San Francisco and became one of the worst natural disasters in U.S. history.
-
E.
Quakes
Quakes is the commonly used nickname for the Major League Soccer club San Jose Earthquakes.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
earthquake sequence
ⓘ
natural disaster ⓘ |
| aftershockCount | tens of thousands of aftershocks ⓘ |
| casualties | at least 1 direct fatality ⓘ |
| caused |
building damage
ⓘ
ground cracking ⓘ infrastructure damage ⓘ liquefaction in some areas ⓘ power outages ⓘ road damage ⓘ rockfalls ⓘ small fires ⓘ surface ruptures ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| depth | approximately 10.5 km ⓘ |
| economicLoss | over 1 billion USD ⓘ |
| endTime | 2019-07-06 ⓘ |
| epicenterNear | Searles Valley, California ⓘ |
| faultType | strike-slip ⓘ |
| feltIn |
Las Vegas, Nevada
ⓘ
Greater Los Angeles Area ⓘ
surface form:
Los Angeles metropolitan area
Northern Mexico ⓘ Phoenix, Arizona ⓘ |
| foreshockDate | 2019-07-04 ⓘ |
| foreshockLocalTime | 10:33 PDT ⓘ |
| hasAftershockMagnitude | 5.4 Mw ⓘ |
| hasForeshockMagnitude | 6.4 Mw ⓘ |
| hasMainshockMagnitude | 7.1 Mw ⓘ |
| injuries | dozens of injuries ⓘ |
| intensityScale | Modified Mercalli intensity scale ⓘ |
| largestEvent |
2019 Ridgecrest earthquakes
self-linksurface differs
ⓘ
surface form:
2019 Ridgecrest mainshock
|
| locatedIn |
Kern County, California
NERFINISHED
ⓘ
Mojave Desert ⓘ San Bernardino County ⓘ
surface form:
San Bernardino County, California
Southern California ⓘ |
| mainshockDate | 2019-07-06 ⓘ |
| mainshockLocalTime | 20:19 PDT ⓘ |
| maximumIntensity | VIII (Severe) ⓘ |
| monitoredBy |
California Institute of Technology
ⓘ
United States Geological Survey ⓘ |
| near | Ridgecrest, California ⓘ |
| partOf | Eastern California Shear Zone ⓘ |
| precededBy | 2019 Ridgecrest foreshock ⓘ |
| prompted |
public safety inspections of infrastructure in affected region
ⓘ
reassessment of seismic hazard in Eastern California Shear Zone ⓘ |
| regionTectonics |
Pacific–North American plate boundary system
ⓘ
surface form:
Pacific Plate–North American Plate boundary
|
| rupturedFaultSystem | Ridgecrest fault system ⓘ |
| startTime | 2019-07-04 ⓘ |
| triggered | activation of ShakeAlert early warning system ⓘ |
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: 2019 Ridgecrest earthquakes Description of subject: The 2019 Ridgecrest earthquakes were a powerful sequence of Southern California quakes, including a magnitude 7.1 mainshock, that caused widespread shaking, surface ruptures, and infrastructure damage across the Mojave Desert region.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
2019 Ridgecrest mainshock