Modeling displacement and stress fields in hydrothermal regions: The case of a thermo-poro-elastic inclusion in a poro-elastic half-space.

Hydrothermal regions experience various phenomena, including ground deformation and, in the case of calderas, interaction between deep magmatic processes and shallow aquifers. The present work introduces a source model consisting of a thermo-poro-elastic inclusion subject to a sudden change of temperature and pore pressure, embedded in a homogeneous poroelastic half-space. We compare semi-analytical solutions for displacement and stress fields within and outside the source with fully numerical solutions and two other source models. The uplift is similar to that of a Mogi source, while displacement, stress field and faulting mechanisms promoted throughout the half-space differ from the other models.