Gjerdrum quick clay landslide of 2020
E862691
The Gjerdrum quick clay landslide of 2020 was a catastrophic earthflow in the village of Ask, Norway, that destroyed dozens of homes, killed multiple residents, and became one of the country’s most serious modern landslide disasters.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Gjerdrum quick clay landslide of 2020 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10428382 — 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: Gjerdrum quick clay landslide of 2020 Context triple: [Gjerdrum, subjectOf, Gjerdrum quick clay landslide of 2020]
-
A.
Trotternish landslip
The Trotternish landslip is a dramatic, ancient landslide formation on the Isle of Skye in Scotland, renowned for its striking cliffs, pinnacles, and otherworldly landscapes.
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B.
Landslide
"Landslide" is a widely acclaimed country-pop ballad famously covered by the Dixie Chicks, known for its introspective lyrics and emotional vocal harmonies.
-
C.
Bay Slides
Bay Slides is a pair of gentle, kid-friendly water slides at Disney’s Typhoon Lagoon water park designed as a smaller version of the park’s main body slides.
-
D.
Storm Slides
Storm Slides is a set of body water slides at Disney’s Typhoon Lagoon water park, known for their fast, twisting descents into a splash pool.
-
E.
Sidoarjo mudflow
The Sidoarjo mudflow is a long-lasting industrial mud volcano disaster in East Java, Indonesia, that began erupting in 2006 and has inundated villages, displaced thousands of residents, and sparked major environmental and legal controversies.
- 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: Gjerdrum quick clay landslide of 2020 Target entity description: The Gjerdrum quick clay landslide of 2020 was a catastrophic earthflow in the village of Ask, Norway, that destroyed dozens of homes, killed multiple residents, and became one of the country’s most serious modern landslide disasters.
-
A.
Trotternish landslip
The Trotternish landslip is a dramatic, ancient landslide formation on the Isle of Skye in Scotland, renowned for its striking cliffs, pinnacles, and otherworldly landscapes.
-
B.
Landslide
"Landslide" is a widely acclaimed country-pop ballad famously covered by the Dixie Chicks, known for its introspective lyrics and emotional vocal harmonies.
-
C.
Bay Slides
Bay Slides is a pair of gentle, kid-friendly water slides at Disney’s Typhoon Lagoon water park designed as a smaller version of the park’s main body slides.
-
D.
Storm Slides
Storm Slides is a set of body water slides at Disney’s Typhoon Lagoon water park, known for their fast, twisting descents into a splash pool.
-
E.
Sidoarjo mudflow
The Sidoarjo mudflow is a long-lasting industrial mud volcano disaster in East Java, Indonesia, that began erupting in 2006 and has inundated villages, displaced thousands of residents, and sparked major environmental and legal controversies.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
earthflow
ⓘ
landslide ⓘ natural disaster ⓘ quick clay slide ⓘ |
| alsoKnownAs |
Ask landslide
NERFINISHED
ⓘ
Gjerdrum landslide NERFINISHED ⓘ |
| areaAffected | approximately 300000 square meters ⓘ |
| cause |
quick clay failure
ⓘ
sensitive marine clay ⓘ |
| country | Norway ⓘ |
| date | 2020-12-30 ⓘ |
| deathToll | 10 ⓘ |
| declaredAs | national disaster ⓘ |
| depth | up to 15 meters ⓘ |
| destroyedBuildings |
apartment blocks
ⓘ
dozens of homes ⓘ farm buildings ⓘ |
| distanceToOslo | about 25 kilometers north ⓘ |
| emergencyResponseBy |
Norwegian Armed Forces
NERFINISHED
ⓘ
Norwegian Civil Defence NERFINISHED ⓘ Norwegian police NERFINISHED ⓘ Norwegian rescue services NERFINISHED ⓘ |
| evacuatedPeople | about 1000 ⓘ |
| injured | several ⓘ |
| investigatedBy |
Norwegian Geotechnical Institute
NERFINISHED
ⓘ
Norwegian Safety Investigation Authority NERFINISHED ⓘ |
| length | about 700 meters ⓘ |
| locatedIn |
Ask
NERFINISHED
ⓘ
Eastern Norway ⓘ Gjerdrum municipality NERFINISHED ⓘ Viken county ⓘ |
| material | quick clay ⓘ |
| missingPersons | 0 ⓘ |
| municipality | Gjerdrum NERFINISHED ⓘ |
| nearestCity | Oslo NERFINISHED ⓘ |
| notableFor | one of Norway’s most serious modern landslide disasters ⓘ |
| prompted |
public debate on building in quick clay areas
ⓘ
review of quick clay hazard mapping in Norway ⓘ revisions to land-use planning guidelines in Norway ⓘ |
| searchAndRescueMethod |
dog teams
ⓘ
drones ⓘ helicopter operations ⓘ |
| startDate | 2020-12-30 ⓘ |
| timeOfDay | early morning ⓘ |
| triggerFactor |
groundwater conditions
ⓘ
heavy rainfall ⓘ |
| typeOfMovement | retrogressive slide ⓘ |
| width | about 300 meters ⓘ |
| year | 2020 ⓘ |
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: Gjerdrum quick clay landslide of 2020 Description of subject: The Gjerdrum quick clay landslide of 2020 was a catastrophic earthflow in the village of Ask, Norway, that destroyed dozens of homes, killed multiple residents, and became one of the country’s most serious modern landslide disasters.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Gjerdrum