Volcano‐Tectonic Interaction and Its Relation with the State of Volcanic Activity

Abstract We develop a three‐dimensional viscoelastic model including a magma chamber and an extrusive volcano to show that there is a volcano‐tectonic interaction by the finite element numerical simulation method. First, we describe the characters of surface deformation, stress distribution and super pressure in the magma chamber with the magma supplying in different states. Then, we analyse the effect of tectonic stress field change on the magma chamber. The results show that a change of 10 MPa in stress boundary condition can bring ±1.2~1.6 MPa change of super pressure in the magma chamber. Such an order of magnitude of stress can trigger the unrest in volcanic systems, and then cause volcanic activities.