GNGTS 2013 - Atti del 32° Convegno Nazionale

References Anderson J.G. and Lei Y.; 1994: Non-parametric description of peak acceleration as a function of magnitude, distance and site in Guerrero, Mexico. Bull. Seism. Soc. Am., 84, 1003-1017. Bay F., Fah D., Malagnini L. and Giardini D.; 2003: Spectral shear-wave ground motion scaling for Switzerland. Bull. Seism. Soc. Am., 93, 414-429. García D., Singh S.K., Herráiz M., Pacheco J.F. and Ordaz M.; 2004: Inslab earthquakes of central Mexico: Q, Source Spectra, and Stress Drop. Bull. Seism. Soc. Am., 94, 789-802. Harmsen S.; 1979: Estimating the diminution of shear-wave amplitude with distance: application to the Los Angeles, California, urban area. Bull. Seism. Soc. Am., 87, 888-903. Herrmann R.B., Benz H. and Ammon C.J.; 2011: Monitoring the Earthquake source process in North America. Bull. Seism. Soc. Am., 101, 2609-2625, doi: 10.1785/0120110095. Jeon Y.S. and Herrmann R.B.; 2004: High-frequency ground-motion scaling in Utah and Yellostone. Bull. Seism. Soc. Am., 94, 1644-1657. Malagnini L., Herrmann R.B. and Di Bona M.; 2000a: Ground motion scaling in the Apennines (Italy). Bull. Seism. Soc. Am.,90, 1062-1081. Malagnini L., Herrmann R.B. and Koch K.; 2000b: Ground motion scaling in Central Europe. Bull. Seism. Soc. Am.,90, 1052-1061. Malagnini L., Akinci A., Herrmann R.B., Pino N.A. and Scognamiglio L.; 2002: Characteristics of the ground motion in northeastern Italy . Bull. Seism. Soc. Am., 92, 2186- 2204.
 Morasca, P., Malagnini L., Akinci A., Spallarossa D. and Herrmann R.B.; 2006: Ground motion scaling in the Western Alps, J. Seismol., 10, 315-333. Scognamiglio L., Malagnini L., Akinci A.; 2005: Ground Motion scaling in Eastern Sicily (Italy). Bull. Seism. Soc. Am., 95, 568-578. Yadz M.R.S.; 1993: Ground motion studies in the Southern Great Basin of Nevada and California. Ph.D. Thesis, Saint Louis University. Fault activity measurements from InSAR space geodesy: the fundamental role of geological constraints for correct data interpretation and analytical fault modeling G. Pezzo Istituto Nazionale di Geofisica e Vulcanologia, CNT, Roma, Italy Introduction. In this study we present some examples of measurement and modeling of the earthquake cycle, in different tectonic domains; we discuss some common problems concerning geodetic data interpretation and fault modeling related to the availability of geological data at the surface and at depth. The study of surface deformation is one of the most important topics to improve the knowledge of the deep mechanisms governing the seismic cycle itself and, eventually, improve the assessment of seismic hazard. To measure the crustal ground deformation associated to fault activity and to the earthquake-cycle we use DInSAR (Differential Interferometric Synthetic Aperture Radar) (Massonnet and Feigl, 1995), MAI (Multi Aperture Interferometry) (Scheiber and Moreira, 2000), (Bechor and Zebker, 2006) and multitemporal InSAR methods (Ferretti et al. , 2001; Berardino et al. , 2002; Hooper, 2007). Currently these techniques allow measuring short-term ground displacement with centimetric accuracy (DInSAR and MAI), and ground velocities with an accuracy of up to one millimeter per year over time periods of several years (Casu et al. , 2006). These levels of accuracy make interferometric methods suitable for the study of tectonic processes, typically affected by deformation rates ranging from millimeters to centimeters per year. Furthermore, these methods allow measurement of ground movements occurring on the different time scales of the earthquake cycle, from the nearly instantaneous deformation caused by seismic dislocations (Massonnet et al. , 1993), to the slow strains of the interseismic phase (Wright et al. , 2001). Many conceptual, numerical, analytical and analog models of the earthquake cycle have been proposed to explain seismological, geological, geomorphological and geodetic data. 93 GNGTS 2013 S essione 1.1