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Soil gas radon measurements around Mt. Etna volcano in terms of evaluation of geodynamic events.

Immé G., Catalano R., Giammanco S., Ichedef M., Neri M., Morelli D., Murè F., Giudice N.
  Venerdì 15/09   15:30 - 18:30   Aula A210   IV - Geofisica e fisica dell'ambiente
Soil gas radon measurements were performed continuously in the east flank of Mt. Etna volcano in order to correlate radon anomalies with local geodynamic processes. Both volcanic activity and seismic monitoring have been carried out by means of seismic stations located around the volcano, while the evaluation of radon data has been done using basic statistics and signal processing methods. Preliminary analysis seems to indicate a clear correlation between soil gas radon variations and volcanic activity, since the November 2015 and May 2016 eruptions were preceded by marked anomalous variations of radon levels in all monitoring stations. Further anomalies have been recognized since November 2016, suggesting a new arrival of fresh magma into the volcano.