| Summary: | Thesis (M.S.) University of Alaska Fairbanks, 2005 The technique of speckle tracking can provide coseismic surface offsets for an earthquake in regions where other geodetic data are not available. These offsets can be used to map the surface deformation and create slip distribution models. This thesis uses speckle tracking to study the 2002 Mw7.9 Denali Fault earthquake, with emphasis on the central section of the rupture. The Denali Fault earthquake began with a thrust event on the Susitna Glacier fault before rupturing unilaterally west to east on the Denali and Totschunda faults with overwhelmingly right-lateral strike-slip motion. A slip distribution estimated from a combination of speckle tracking data from the central section of the rupture, GPS data, and geologic data displays highly variable slip, with four major patches of high slip along the Denali fault. Compared to the primarily GPS-derived model of Hreinsdóttir [2005], the combined model is better constrained along the central rupture and predicts slip values much closer to the geologic offset measurements. A significant releasing bend in the fault just west of the pipeline can be correlated to a patch of high slip and the second-largest pulse of moment release along the rupture, suggesting that fault geometry plays an important role in earthquake mechanics. Introduction -- Tectonic background -- Overview of SAR and speckle tracking -- Speckle tracking data -- Data processing -- Coseismic displacements determined from offsets -- 3-D fault model -- Discussion -- Conclusions -- References.
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