Figure 1.

Sketches of conceptual models, including (a) the traditional pressurized spherical cavity model (e.g., Mogi model), (b) the model of laminar flow into a magma‐filled reservoir (analytic solution), and (c) FEM configuration for the model of magma propagation into an ellipsoidal reservoir embedded in a viscoelastic domain. Parameter names and units are listed in Table 1. In Figures 1b and 1c, ΔP _i(t) is the time‐dependent magma injection pressure imposed as a boundary condition at the base of the conduit. Dashed line is the symmetry axis in the 2‐D axisymmetric configuration. Green lines denote the free surface at the interface between air and rock. Blue lines in Figure 1c show the fixed boundary conditions in the FEM configuration.