DYNAMIC STRESS VARIATIONS DUE TO SHEAR FAULTS IN A PLANE-LAYERED MEDIUM

A complete set of expressions is presented for the computation of elas tic dynamic stress in plane-layered media. We use a discrete-wavenumbe r reflectivity method to compute the stress held radiated by arbitrary moment-tenser sources. The expressions derived here represent an inte resting tool for both the observational and theoretical analysis of dy namic stress changes associated with earthquake phenomena. Dynamic str ess changes associated with a strike-slip fault having unilateral rupt ure are shown. This modelling, which is similar to the 1992 Landers Ca lifornia earthquake, illustrates the effects of distance, directivity and depth on transient stress changes.