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Ground Failure

Geotechnical Observations of the November 3, 2002 M7.9 Denali Fault Earthquake

Figure 7.

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Where surface crust (~0.3m) was rafted on a liquefied layer, lateral movement drove the crust down-slope. In low-areas (here, a return channel) collision of two crusts resulted in between 3.8m and 4.3m of shortening (near SASW Site 588TET).

Photo of ruptured crust.
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last modified 20 January 2005