1946 Vancouver Island earthquake
E831844
The 1946 Vancouver Island earthquake was a powerful magnitude 7.3 intraplate earthquake that struck Vancouver Island, British Columbia, causing significant damage and one of the strongest recorded seismic events in Canadian history.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 1946 Vancouver Island earthquake canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9970949 — 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: 1946 Vancouver Island earthquake Context triple: [1949 Queen Charlotte Islands earthquake, precededBy, 1946 Vancouver Island earthquake]
-
A.
1949 Queen Charlotte Islands earthquake
The 1949 Queen Charlotte Islands earthquake was a powerful magnitude 8.1 megathrust event off the coast of British Columbia, Canada, that ranks among the largest recorded earthquakes in North America.
-
B.
2006 Kīholo Bay earthquake
The 2006 Kīholo Bay earthquake was a powerful undersea earthquake off the northwest coast of Hawaiʻi Island that caused widespread structural damage and power outages across the Hawaiian Islands.
-
C.
1967 Mudurnu Valley earthquake
The 1967 Mudurnu Valley earthquake was a major and destructive seismic event in northwestern Turkey that ruptured a segment of the North Anatolian Fault, causing significant damage and casualties.
-
D.
1707 Hoei earthquake
The 1707 Hoei earthquake was a massive megathrust earthquake off southwestern Japan that triggered widespread destruction and a large tsunami, and is one of the most powerful earthquakes in Japanese history.
-
E.
1960 Valdivia earthquake
The 1960 Valdivia earthquake was the most powerful earthquake ever recorded, a magnitude 9.5 megathrust event that devastated southern Chile and triggered tsunamis across the 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: 1946 Vancouver Island earthquake Target entity description: The 1946 Vancouver Island earthquake was a powerful magnitude 7.3 intraplate earthquake that struck Vancouver Island, British Columbia, causing significant damage and one of the strongest recorded seismic events in Canadian history.
-
A.
1949 Queen Charlotte Islands earthquake
The 1949 Queen Charlotte Islands earthquake was a powerful magnitude 8.1 megathrust event off the coast of British Columbia, Canada, that ranks among the largest recorded earthquakes in North America.
-
B.
2006 Kīholo Bay earthquake
The 2006 Kīholo Bay earthquake was a powerful undersea earthquake off the northwest coast of Hawaiʻi Island that caused widespread structural damage and power outages across the Hawaiian Islands.
-
C.
1967 Mudurnu Valley earthquake
The 1967 Mudurnu Valley earthquake was a major and destructive seismic event in northwestern Turkey that ruptured a segment of the North Anatolian Fault, causing significant damage and casualties.
-
D.
1707 Hoei earthquake
The 1707 Hoei earthquake was a massive megathrust earthquake off southwestern Japan that triggered widespread destruction and a large tsunami, and is one of the most powerful earthquakes in Japanese history.
-
E.
1960 Valdivia earthquake
The 1960 Valdivia earthquake was the most powerful earthquake ever recorded, a magnitude 9.5 megathrust event that devastated southern Chile and triggered tsunamis across the Pacific.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
earthquake
ⓘ
intraplate earthquake ⓘ |
| affectedArea |
British Columbia mainland
NERFINISHED
ⓘ
Vancouver Island NERFINISHED ⓘ Washington State NERFINISHED ⓘ |
| casualties | 1 fatality ⓘ |
| caused |
chimney collapses
ⓘ
ground cracking ⓘ landslides ⓘ structural damage on Vancouver Island ⓘ |
| continent | North America ⓘ |
| country | Canada ⓘ |
| damageCost | millions of 1946 Canadian dollars (approximate) ⓘ |
| damaged |
buildings in Courtenay
ⓘ
buildings in Cumberland ⓘ buildings in Port Alberni ⓘ infrastructure on Vancouver Island ⓘ |
| date | 1946-06-23 ⓘ |
| depth | shallow-focus ⓘ |
| epicenterCountry | Canada NERFINISHED ⓘ |
| epicenterRegion | central Vancouver Island ⓘ |
| feltIn |
Alberta
NERFINISHED
ⓘ
British Columbia NERFINISHED ⓘ Oregon NERFINISHED ⓘ Washington NERFINISHED ⓘ northwestern United States NERFINISHED ⓘ |
| hasAftershocks | yes ⓘ |
| historicalSignificance | prompted increased study of intraplate seismic hazards in western Canada ⓘ |
| injuries | multiple injuries ⓘ |
| location |
British Columbia
NERFINISHED
ⓘ
Pacific Northwest NERFINISHED ⓘ Vancouver Island NERFINISHED ⓘ |
| magnitude | 7.3 ⓘ |
| magnitudeScale | moment magnitude scale NERFINISHED ⓘ |
| maximumIntensity | VIII (Severe) ⓘ |
| month | June ⓘ |
| notableFor |
being one of the largest recorded earthquakes in Canadian history
ⓘ
being the largest onshore earthquake instrumentally recorded in Canada at the time ⓘ |
| occurredInTimeZone | PST ⓘ |
| partOf | seismicity of the Pacific Northwest ⓘ |
| plate | North American Plate NERFINISHED ⓘ |
| recordedBy | seismographs worldwide ⓘ |
| tectonicSetting | intraplate ⓘ |
| triggered | local tsunamis or seiches in some inlets and lakes ⓘ |
| typeOfFaulting | crustal faulting within the North American Plate ⓘ |
| year | 1946 ⓘ |
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: 1946 Vancouver Island earthquake Description of subject: The 1946 Vancouver Island earthquake was a powerful magnitude 7.3 intraplate earthquake that struck Vancouver Island, British Columbia, causing significant damage and one of the strongest recorded seismic events in Canadian history.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.