Modelling deformation due to a pressurized ellipsoidal cavity, with reference to the Campi Flegrei caldera, Italy

摘要: [1] Magmatic unrest can be successfully monitored and studied from modeling of the induced surface deformation; one limiting factor however is small number available magmatic source models. Here we have obtained expressions (quadrupole approximation) for displacements stresses inflation any pressurized triaxial ellipsoid in an infinite elastic medium. The evaluated by combining effects seven suitable point sources are approximately valid also a heterogeneous half-space. Till now, only (approximate or exact) finite expansion referred to spheres, prolate spheroids, horizontal circular cracks embedded homogeneous Our approach allows model oblate spheroids non-axisymmetric sources, whose were previously estimable far field through moment tensor representation. We show that when deformation vertically flattened ellipsoid, inversion superficial using general may lead wrong physical models itself. This case Campi Flegrei caldera, as well other calderas.