GNGTS 2015 - Atti del 34° Convegno Nazionale

GNGTS 2015 S essione 1.3 163 Chiodini, G., Caliro S.,.Cardellini C., Avino R., Granieri D., Schmidt A., (2008). Carbon isotopic composition of soil CO 2 flux, a powerful method to discriminate different sources feeding soil CO 2 degassing in volcanic-hydrothermal areas , Earth Planet. ���� ������ ��������� �������� ������������������������������� Sci. Lett., 274(3–4), 372–379, doi:10.1016/j.epsl.2008.07.051. Chiodini G., Caliro S., Cardellini C., Granieri D., Avino R., Baldini A., Donnini M., Minopoli C., (2010). Long term variations of the Campi Flegrei (Italy) volcanic system as revealed by the monitoring of hydrothermal activity . J Geophys Res vol. 115, ISSN: 0148-0227, doi: 10.1029/2008JB006258 Chiodini G., Caliro S., De Martino P., Avino R., Gherardi F. (2012). Early signals of new volcanic unrest at Campi Flegrei caldera? Insights from geochemical data and physical simulations . Geology, published online on 23 July 2012 as doi:10.1130/G33251.1 Giggenbach, W.F., (1980). Geothermal gas equilibria . Geochim. Cosmochim. Acta, 44, 2021- 2032. Giggenbach, W.F., (1987). Redox conditions governing the chemistry of fumarolic gas discharges from White Island, New Zealand . Appl. Geochem, 2, 143-161. Giggenbach, W.F., (1991). Chemical techniques in geothermal exploration. In: D’Amore, F. (coordinator), Application of geochemistry in geothermal reservoir development . ����������� ������������ ����� �������� UNITAR/UNDP publication, Rome, 119-142. Granieri D., Avino R., Chiodini G. (2010). Carbon dioxide diffuse emission from the soil: ten years of observations at Vesuvio and Campi Flegrei (Pozzuoli), and linkages with volcanic activity . Bull Volcanol (2010) 72:103–118 DOI 10.1007/s00445-009-0304-8. Orsi G., de Vita S., Di Vito M., (1996). The restless, resurgent Campi Flegrei nested caldera (Italy): constraints on its evolution and configuration . �� ��������� ��������� �������� ��� �������� J. Volcanol. Geotherm. Res.,74, pp. 179-214. Orsi, G., Di Vito, M.A., Isaia, R., (2004). Volcanic hazard assessment at the restless Campi Flegrei caldera . ����� Bull. Volcanol. 66, 514–530. Tassi F., Nisi B., Cardellini C., Capecchiacci F., Donnini M., Vaselli O., Avino R., Chiodini G. (2013). Diffuse soil emission of hydrothermal gases (CO 2 , CH 4 , and C 6 H 6 ) at Solfatara crater (Campi Flegrei, southern Italy). Applied Geochemistry 35 (2013) 142–153. Tassi F., Venturi S., Cabassi J., Capecchiacci F., Nisi B., Vaselli O. (2015). Volatile organic compounds (VOCs) in soil gases from Solfatara crater(Campi Flegrei, southern Italy): Geogenic source(s) vs. biogeochemicalprocesse. Applied Geochemistry 56 (2015) 37-49. Todesco M., Chiodini G., Macedonio G. (2003). Monitoring and modelling hydrothermal fluid emission at La Solfatara (Phlegrean Fields, Italy). An interdisciplinary approach to the study of diffuse degas sing. Journal of Volcanology and Geothermal Research, 125,1-2, 57-79. INSIGHTS INTO THE SEISMICITY AND ERUPTIONS OF PANTELLERIA ISLAND AND ITS SURROUNDINGS (SICILY CHANNEL, ITALY) S. Spampinato 1 , A. Ursino 1 , M.S. Barbano 2 , C. Pirrotta 2 , S. Rapisarda 1 , G. Larocca 1 , P.R. Platania 1,3 1 Istituto Nazionale di Geofisica e Vulcanologia – Osservatorio Etneo, Sezione di Catania, Italy 2 Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Catania, Italy 3 now at Istituto Nazionale di Astrofisica – Istituto di Radioastronomia, Sezione di Noto, Italy Introduction. The Istituto Nazionale di Geofisica e Vulcanologia – Osservatorio Etneo (INGV-OE) manages a permanent local seismic network in Eastern Sicily, with the aim of monitoring the main tectonic areas (Iblei, Peloritani) and active Sicilian volcanoes (Etna, Vulcano, Stromboli). This network enables locating low magnitude earthquakes and detecting low energy signals that are typical of active volcanic areas (e.g. volcanic tremor, explosion quakes, LP events). Apart from Mt. Etna and the Aeolian islands, another area characterized by active volcanism is the Sicily Channel, with the volcanic edifices of Pantelleria and Linosa islands. The emergence (and subsequent disappearance after about two months) in 1831 of the Ferdinandea island, as well as the Foerstner island in 1891 (about 4 km north of Pantelleria), is the most reliable and recent evidence of volcanism in the Sicily Channel, which is undersea for the most part (Fig. 1). Since there are only a few onshore areas in the Sicily Channel, it is therefore difficult to instrumentally detect its seismicity with traditional onshore networks, with the exception of locating the foci of high-energy earthquakes, which often have poor azimuthal constraints. Ocean Bottom Seismometers (OBS) are not widely used owing to the high costs of the instruments and