Quantification of Volcano Deformation Caused by Volatile Accumulation and Release

Crustal-stored magma reservoirs contain exsolved volatiles which accumulate in the reservoir roof, exerting a buoyancy force on crust. This produces surface uplift and sudden loss of through eruption results syn-eruptive subsidence. Here, we present three-dimensional, visco-elasto-plastic, numerical modeling quantify ground deformation arising from growth release volatile reservoir. Deformation is mostly independent crustal thermal distribution shape, but function volume, density depth rigidity. We scaling law for volatiles' contribution to subsidence show this contributes ∼20% observed associated with 2015 Calbuco eruption. Our highlight key role that volatile-driven can have volcano deformation, new link between degassing deflation, shallow accumulation may significant impact volcanoes.