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Simulating Ground Deformation From Magma Migration Utilizing a Dipole Source

Description: 

The ability to detect and monitor magma movement in volcanic areas is vital for predicting eruptions and mitigating associated risks. This research focuses on the simulation of ground deformation resulting from magma migration using a new dipole source within volcanic regions. Typically, predictive models, either analytical or numerical, incorporating internal Earth forces such as pressure and volume changes, are employed to infer ground deformation. Dynamic patterns associated with volcanic deformation sources, such as inflation and deflation for volumetric sources, and opening and closing for dyke-type sources, are well-established. This study seeks to present an analytical solution for surface deformation caused by the migration of a volumetric source, specifically applicable to minor movements in an elastic half-space. The proposed model resembles a volumetric dipole, characterized by an oriented axis connecting the source's initial and final positions. This approach facilitates the modeling of ground deformation based on source migration, and the estimation of source migration from measured ground deformation through data inversion. To evaluate the dipole solution, a comparison is made with the fundamental volumetric source in terms of its peculiarities, capabilities, and applicability. The examination of continuous deformation data from GNSS stations on Mt. Etna discloses that a dipole source becomes active several days prior to the December 2018 eruption, providing valuable insight into the identification of the final magma ascent.

Session: Multidisciplinary Approaches for Volcanic Eruption Forecasting [Poster Session]

Type: Poster

Date: 5/2/2024

Presentation Time: 08:00 AM (local time)

Presenting Author: Flavio

Student Presenter: No

Invited Presentation: 

Authors