Presenter: Chiou-Shiang Lee
Date: 2015/10/15
Abstract
In previous studies, fault slip rates derived from some geodesy-constrained kinematic models disagree with slip rate estimates from geologic techniques along major fault segments in southern California. The range of reported model and geologic slip rates are large that it remains unclear whether these apparent discrepancies are real or attributable to epistemic uncertainties in two types of estimates. The uncertainties’ examination of geodetically derived slip rate estimates on major faults in southern California are conducted by inversions with four models. Deforming elastic block models constrained by geologic slip rates can fit the present-day GPS-derived velocity field better than rigid block models. Model incorporating viscoelastic mantle flow predict systematically higher slip rates than purely elastic models. By paleoseismological data and a kinematic model, the faults of San Andreas system suppress activity on faults in the eastern California shear zone, and vice versa.
Reference