Geoscience Reference
In-Depth Information
Villages / Towns
6654
Huascaran
6654
Huascaran
Roads
1962 avalanche
IIIIIIII
1970 avalanche
5381
IIIIII
Glacier
Rivers
5381
Heights in metres
4562
4183
3907
3324
3133
3095
2800
2940
2789
2755
Yu ngay
Yungay
2538
Ranrahirca
Case Fig. 2.1 Map of the
Rio Shacsha and Nevado
HuascarĂ¡ area, Peru showing the
runout tracks of the 1962 and
1970 avalanches. (Modified from
Whittow 1980.)
Malacoto
Although details of the Pre-Columbian event are less well known and no estimates of loss of life
are available, the 1962 event destroyed nine towns including most of Ranrahirca (Case Fig. 2.1),
killing approximately 4000 people. Although the trigger mechanism for this event is not known the
avalanche appears to have originated as an icefall from the same part of the west face of the North
Peak of HuascarĂ¡n. Based on evidence from deposits this was predominantly a rock avalanche.
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