GNGTS 2019 - Atti del 38° Convegno Nazionale

190 GNGTS 2019 S essione 1.3 Bertini G., Casini M., Gianelli G., and Pandeli E.; 2006: Geological structure of a long-living geothermal system, Larderello, Italy . Terra Nova, 18 , 163-169. De Matteis R., Vanorio T., Zollo A., Ciuffi S., Fiordelisi A. and Spinelli E.; 2008: Three-dimensional tomography and rock properties of the Larderello-Travale geothermal area, Italy . Physics of the Earth and Planetary Interiors, 168, 37–48. Galuzzi B. G., Zampieri E. and Stucchi E.; 2017: A local adaptive method for the numerical approximation in seismic wave modelling . Communications in Applied and Industrial Mathematics, 8 (1), 265-281, DOI: 10.1515/caim- 2017-0014. Liotta, D. and Ranalli, G.; 1999: Correlation between seismic reflectivity and rheology in extended lithosphere: southern Tuscany, Inner Northern Apennines, Italy . Tectonophysics, 315, 109–122. Mazzotti A., Bienati N., Stucchi E., Tognarelli A., Aleardi M. and Sajeva A.; 2017: Two-grid genetic algorithm full- waveform inversion . The Leading Edge, 35 (12), 1068-1075, DOI: 10.1190/tle35121068.1 Pierini S., Aleardi M. and Mazzotti A.; 2019: A method to attenuate genetic drift in genetic-algorithm optimizations: Applications to analytic objective functions and two seismic optimization problems . Geophysics, 84 (2), R295– R310, DOI: 10.1190/GEO2018-0374.1 Sajeva A., Aleardi M., Galuzzi B., Stucchi E., Spadavecchia E. and Mazzotti A.; 2017: Comparing the performances of four stochastic optimisation methods using analytic objective functions, 1D elastic full-waveform inversion, and residual static computation . Geophysical Prospecting, 65 , 322–346, DOI: 10.1111/1365-2478.12532 Sajeva A., Bienati N., Aleardi M., Stucchi E., Bienati N. and Mazzotti, A.; 2016: Estimation of acoustic macro-models using a genetic full-waveform inversion: applications to the Marmousi model . Geophysics, 81 (4), R173-R184, DOI:10.1190/geo2015-0198.1 Tarantola, A.; 1984: Inversion of seismic reflection data in the acoustic approximation . Geophysics, 49 , 1259–1266. Xing Z. and Mazzotti A.; 2019a: Two-grid full-waveform Rayleigh-wave inversion via a genetic algorithm: part 1 - method and synthetic examples . Geophysics, 84 (5), R805–R814, DOI:10.1190/GEO2018-0799.1. Xing Z. and Mazzotti A.; 2019a: Two-grid full-waveform Rayleigh-wave inversion via a genetic algorithm: part 2 - application to two actual data sets . Geophysics, 84 (5), R815–R825, DOI:10.1190/GEO2018-0800.1. TEMPORAL RELATIONSHIPS BETWEEN GEOPHYSICAL AND GEOCHEMICAL SIGNALS DURING THE UNREST PHASE OF 1988 AT THE ISLAND OF VULCANO (AEOLIAN ISLANDS, ITALY) M. Messina Università degli Studi di Catania, Italy Introduction. The island of Vulcano is the southernmost of the Aeolian Islands and forms together with Lipari an elongated NNW-SSE system cutting the archipelago along the strike- slip Tindari-Letojanni fault system (ATLFS). The volcanic complex of Vulcano rises from about 1000 m b.s.l., reaching a maximum height of 499 m a.s.l. at Monte Aria. Vulcano is connected with Lipari, from which it is separated by a thin and shallow sea channel (Bocche di Vulcano). The island of Vulcano entirely consists of volcanic rocks with variable geochemical signature and evolutionary degree, which cover a wide compositional range from basalts to rhyolites (De Astis 1997). The subaerial volcanism began about 130 ka ago, showing a wide spectrum of explosive activity, which is especially associated with a strong water-magma interaction (De Astis et al., 2013). The last eruptive event at Vulcano occurred on 1888-1890 AD. Since that time, the volcano has been in a state of quiescence, with volcanic manifestations mainly characterized by intense exhalations and moderate seismic activity related to the migration of magmatic and hydrothermal fluids (Cannata et al. , 2012; Peccerillo et al. , 2006). There have