Hydrogeology of Stromboli volcano, Aeolian Islands (Italy) from the interpretation of resistivity tomograms, self-potential, soil temperature and soil CO2 concentration measurements

A hydrothermal system beneath Stromboli volcano, Italy, extends farther and deeper than previously thought, posing potential risks to the stability of its eastern flank. Researchers used resistivity tomograms, self-potential measurements, soil temperature, and CO2 concentrations along two profiles spanning 4.8 km and 3.5 km to map shallow aquifers and the hydrothermal system's extent. The study revealed a broad lateral extension of low-resistivity zones (15–60 ohm m) near villages like Scari and San Vincenzo, corroborated by temperature data from shallow wells. Notably, the hydrothermal body reaches the lower third of the Rina Grande sector collapse area, suggesting mechanical instability due to its proximity to an old collapse boundary. Self-potential data further pinpointed an aquifer above these villages, aiding depth estimation.

Revil, A., Finizola, A., Ricci, T., Delcher, E., Peltier, A., Barde-Cabusson, S., Avard, G., Bailly, T., Bennati, L., Byrdina, S., Colonge, J., Di Gangi, F., Douillet, G., Lupi, M., Letort, J., & Tsang Hin Sun, E. (2011). Hydrogeology of Stromboli volcano, Aeolian Islands (Italy) from the interpretation of resistivity tomograms, self-potential, soil temperature and soil CO2 concentration measurements. Geophysical Journal International, 186(3), 1078–1094. https://doi.org/10.1111/j.1365-246x.2011.05112.x