Khumbu Icefall
E128160
The Khumbu Icefall is a notoriously dangerous, constantly shifting glacier section on the south side of Mount Everest that climbers must traverse on the route from Nepal to the summit.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Khumbu Icefall canonical | 8 |
| KhumbuIcefall | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1114092 — 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: Khumbu Icefall Context triple: [Mount Everest, hasFeature, Khumbu Icefall]
-
A.
Baltoro Glacier
Baltoro Glacier is one of the world’s largest and most famous mountain glaciers, located in Pakistan’s Karakoram range and serving as a key route to K2 and other high peaks.
-
B.
Susten Pass
Susten Pass is a high mountain pass in the Swiss Alps known for its scenic road connecting the cantons of Bern and Uri.
-
C.
Amukta Pass
Amukta Pass is a major maritime strait in the central Aleutian Islands of Alaska, providing an important passage between the North Pacific Ocean and the Bering Sea.
-
D.
Gemmi Pass
Gemmi Pass is a high mountain pass in the Swiss Bernese Alps, known for its dramatic cliffs, hiking trails, and historic route linking Leukerbad in Valais with Kandersteg in Bern.
-
E.
Lowari Pass
Lowari Pass is a high mountain pass in northern Pakistan that connects the Chitral region with the rest of Khyber Pakhtunkhwa through the Hindu Kush range.
- 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: Khumbu Icefall Target entity description: The Khumbu Icefall is a notoriously dangerous, constantly shifting glacier section on the south side of Mount Everest that climbers must traverse on the route from Nepal to the summit.
-
A.
Baltoro Glacier
Baltoro Glacier is one of the world’s largest and most famous mountain glaciers, located in Pakistan’s Karakoram range and serving as a key route to K2 and other high peaks.
-
B.
Susten Pass
Susten Pass is a high mountain pass in the Swiss Alps known for its scenic road connecting the cantons of Bern and Uri.
-
C.
Amukta Pass
Amukta Pass is a major maritime strait in the central Aleutian Islands of Alaska, providing an important passage between the North Pacific Ocean and the Bering Sea.
-
D.
Gemmi Pass
Gemmi Pass is a high mountain pass in the Swiss Bernese Alps, known for its dramatic cliffs, hiking trails, and historic route linking Leukerbad in Valais with Kandersteg in Bern.
-
E.
Lowari Pass
Lowari Pass is a high mountain pass in northern Pakistan that connects the Chitral region with the rest of Khyber Pakhtunkhwa through the Hindu Kush range.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
glacial feature
ⓘ
icefall ⓘ |
| 2014AvalancheDeaths | 16 Nepali guides ⓘ |
| accessPoint |
Everest Base Camp (South)
ⓘ
surface form:
Everest Base Camp (south)
|
| bestTimeToCross | early morning ⓘ |
| characterizedBy |
constantly shifting ice
ⓘ
frequent avalanches ⓘ ice blocks the size of houses ⓘ ice collapses ⓘ ice towers ⓘ large crevasses ⓘ seracs ⓘ |
| climbingDiscipline | high-altitude mountaineering ⓘ |
| consideredByClimbersAs | one of the most dangerous sections of the Everest South Col route ⓘ |
| crossedBy |
fixed ladders over crevasses
ⓘ
fixed ropes ⓘ |
| elevationAboveSeaLevel | approximately 5486–5791 meters ⓘ |
| formedBy | movement of the Khumbu Glacier over a steep drop ⓘ |
| geologicalType | part of a valley glacier ⓘ |
| glacierFlowRate | up to about 0.9 meters per day ⓘ |
| knownFor |
high fatality rate among climbers and Sherpas
ⓘ
high objective danger ⓘ rapid movement of glacier ice ⓘ |
| languageOfToponym | Nepali ⓘ |
| liesBetween |
Everest Base Camp (South)
ⓘ
surface form:
Everest Base Camp and Western Cwm
|
| locatedIn |
Khumbu
ⓘ
surface form:
Khumbu region
Province No. 1, Nepal ⓘ Solukhumbu District, Nepal ⓘ
surface form:
Solukhumbu District
|
| locatedInCountry | Nepal ⓘ |
| locatedOn | south side of Mount Everest ⓘ |
| lowerTerminus | near Everest Base Camp ⓘ |
| managedBy | Icefall Doctors ⓘ |
| namedAfter |
Khumbu
ⓘ
surface form:
Khumbu region
|
| near |
Lhotse Face
ⓘ
surface form:
Lhotse face (higher on the route)
|
| notableEvent | 2014 Mount Everest ice avalanche ⓘ |
| onRouteTo | Mount Everest summit via south side ⓘ |
| partOf |
Khumbu Glacier
ⓘ
Southeast Ridge route on Mount Everest ⓘ
surface form:
standard South Col route on Mount Everest
|
| reasonForBestTimeToCross | colder temperatures stabilize ice ⓘ |
| requires |
technical ice-climbing skills
ⓘ
use of crampons ⓘ use of ice axes ⓘ use of ladders for crevasse crossings ⓘ |
| riskType |
avalanches from surrounding slopes
ⓘ
crevasse fall ⓘ serac collapse ⓘ |
| upperTerminus | Western Cwm ⓘ |
| usedBy | expedition climbers on the south side of Everest ⓘ |
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: Khumbu Icefall Description of subject: The Khumbu Icefall is a notoriously dangerous, constantly shifting glacier section on the south side of Mount Everest that climbers must traverse on the route from Nepal to the summit.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Sagarmatha
this entity surface form:
KhumbuIcefall