the Denali Fault M7.9 earthquake, November 3, 2002
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View east along fault trace in upper Jack Creek, near the point of maximum displacement during the November 3 earthquake. The new scarp in the foreground lines up with an older gully along the fault trace on the opposite hillslope. The broken and displaced snow cover resulted from shaking and is typical on steep slopes near the fault.
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Shattered ice on a lake near Mentasta Pass. This pattern was typical of lakes along the fault trench and in nearby valley bottoms that were subjected to strong shaking.
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Huge fissure along the easternmost rupture of the Denali fault. En echelon fissures like this display about 5.5 meters of right-lateral offset, but little or no vertical offset.
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Scarp of a south-striking extensional stepover fault in the northern Totschunda fault system. This scarp displays 2.65 m of vertical offset (east side up), but only 0.6 m right lateral offset.
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The same scarp as in the previous photo, showing the extensional component of the displacement. The tundra mat has been torn off of the upthrown side and dragged westward down the scarp face, rotating the displaced trees in the process.
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The same scarp as in the previous two photos where it cut across the Little Tok River to form a new waterfall.
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Want more info? Go to the Alaska Earthquake Information Center
or
U.S. Geological Survey Earthquake Hazards Program
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This site is maintained by Catherine.Hanks@gi.alaska.edu
Last updated on November, 2002