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Ground Failure

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

Figure 6.

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Lateral spreads on bars of the Tanana River. The crust of the bar was frozen to a depth of approximately 0.3 meters at the time of the earthquake and shattered in a polygonal pattern that was observed along several hundred miles of the river deposits (Site 588TET. Tanana River, Tetlin Bridge).

Photo of lateral spreads on Tanana River.

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