  Deformation in the lithosphere-asthenosphere system can be accommodated by
faulting and plastic flow. However, incorporating structural data in models of
distributed deformation still represents a challenge. Here, I present solutions
for the displacements and stress in a half-space caused by distributed
anelastic strain confined in a tetrahedral volume. These solutions form the
basis of curvilinear meshes that can adapt to realistic structural settings,
such as a mantle wedge corner, a spherical shell around a magma chamber, or an
aquifer. I provide computer programs to evaluate them in the cases of
anti-plane strain, in-plane strain, and three-dimensional deformation. These
tools may prove useful in the modeling of deformation data in tectonics,
volcanology, and hydrology.
