Resolving the Deformation Style and Slip Behavior of the Castle Mountain Fault, South-Central Alaska

The Castle Mountain fault (CMF) is a major active fault in south-central Alaska that poses a significant seismic hazard to the Anchorage and Matanuska-Susitna Valley urban areas. Previous studies of the CMF have reached conflicting conclusions regarding its kinematics, slip behavior, and earthquake rupture history. Earlier paleoseismic, geomorphic, and geodetic studies suggested that the CMF is predominately right-lateral with slip rate values ranging from 0.07 - 3.0 mm/yr, while more recent work suggests that the CMF accommodates reverse dip-slip motion of