GNGTS 2016 - Atti del 35° Convegno Nazionale

320 GNGTS 2016 S essione 2.1 RovidaA., Locati M., Camassi R., Lolli B., Gasperini P.; 2016: CPTI15, the 2015 version of the Parametric Catalogue of Italian Earthquakes. �������� ��������� �� ��������� � ������������ Istituto Nazionale di Geofisica e Vulcanologia . doi :http://doi.org/10.6092/INGV.IT- CPTI15. Scafidi D., Barani S., De Ferrari R., Ferretti G., Pasta M., Pavan M., Spallarossa D. and Turino C.; 2015: Seismicity of northwestern Italy during the last thirty years . ������� �� ����������� Journal of Seismology, 19 , 201-218. Slejko D., Santulin M. and Garcia J.; 2014: Seismic hazard estimates for the area of Pylos and surrounding region (SW Peloponnese) for seismic and tsunami risk assessment . Boll. Geof. Teor. Appl., 55 , 433-468. doi:10.4430/ bgta0090. Stucchi M., Meletti C., Montaldo V., Crowley H., Calvi G.M. and Boschi E.; 2011: Seismic hazard assessment (2003– 2009) for the Italian building code . Bull. Seism. Soc. Am., 101 , 1885–1911. doi: 10.1785/0120100130. Toro G. R., Abrahamson N. A. and Schneider J. F.; 1997: Model of strong motions from earthquakes in central and eastern North America: best estimates and uncertainties . Seism. Res. Lett., 68 , 41-57.  Weichert D. H.; 1980: Estimation of the earthquake recurrence parameters for unequal observation periods for different magnitudes . Bull. Seismol. Soc. Am., 70 , 1337-1346. Correlation between Earth’s emitted TIR radiation, anomalous transients in Radon emission, and seismicity in North Italy A. Riggio 1 , N. Genzano 2,4 , M. Lisi 2,5 , A.Tamaro 1,6 , M. Santulin 1,7 , G. Sileo 2 , V. Tramutoli 2,3,5 1 Istituto Nazionale di Oceanografia e Geofisica Sperimentale – OGS, Trieste, Italy 2 School of Engineering, University of Basilicata, Potenza, Italy 3 Institute of Methodologies for Environmental Analysis of the National Research Council, Tito Scalo (PZ), Italy 4 Graduate School of Science, Chiba University, Chiba, Japan 5 International Space Science Institute, Bejiing, China 6 Università degli Studi di Udine, Italy 7 Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione di Milano, Italy Introduction. Looking for a reduction of the seismic hazard in the short term (days to weeks) the use of a real-time integration of multi-parametric observations is expected to accelerate the process toward improved, and operationally more effective, systems for time- Dependent Assessment of Seismic Hazard (t-DASH) and earthquake forecast (Tramutoli et al. , 2014). The earthquake is the final effect of a long preparation process in which the increasing of the stress, produced by deep geodynamics, develops new micro fractures in the rocks with consequent variation of their chemical-physical characteristics. These variations, which occur as transient phenomena, can provide information about the status of crustal deformation and to the seismogenic process over a large zone. The width of the area, potentially involved in the preparation process of the earthquake, it is one of the most controversial points. The limitation on the parameters observations is given by very few acquisition sites. The satellite techniques have overcome this problem and made it possible to make measurements of the Earth’s crust temperature of any zone; in our case, for example, all over Italy. In this paper two earthquake precursors potential parameters have been analysed: Thermal Infrared Radiation (TIR) and Radon gas concentration. Anomalous transient increasing in radon concentrations was often reported as earthquake precursor phenomena already in 1920 (Petrini et al. , 2012; Riggio et al. , 2013). Radon is a natural gas, produced in soil, by the radioactive decay of the radium element, produced in turn by uranium. Because radon is a gas and can leave the rocks and soils by escaping into fractures and openings in rocks and into the pore spaces between grains of soil. Radon travels by diffusion (but in this case it moves slowly) or by convection through gas carrier (as methane, carbon dioxide and nitrogen). The porosity-permeability changes, produced by the pressure variations, and the dissolution of gypsum can develop the CO 2 gas, that is a carrier gas of the radon (Riggio and Santulin, 2010). Radon is soluble in water although its spread in the water is slower than in air. The Radon can be acquired, then, in air, in soil or in water.