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.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Gjerdrum quick clay landsslide of 2020 | 0 |
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 ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Gjerdrum