Effects of generally anisotropic crustal rocks on fault-induced displacement and strain fields

We present a new solution for the elastic displacement and strain fields on or near Earth's surface due to rectangular faults in an anisotropic half-space, expressed as a summation of (A) the solution in an infinite space which is singular, and (B) the complementary part which is regular and well-behaved. These two solutions are expressed in terms of the mathematically elegant and computationally powerful Stroh formalism and can be applied to the generally anisotropic rock half-space or a transversely isotropic rock mass with any oriented plane of isotropy. For any flat fault of polygonal shape, one needs only to carry out a simple line integral from 0 to pi in order to express the fault-induced response. Numerical examples are presented to demonstrate the significant effect of the rock anisotropy and layer orientation on the fault-induced displacement and strain fields in anisotropic rocks. Potential applications are wide ranging, from faults in sedimentary strata to strongly deformed metamorphic rocks with steeply dipping foliation. (C) 2018 Institute of Seismology, China Earthquake Administration, etc. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.