HR: 0800h
AN: S51A-0214    [Abstracts]
TI: Real-Time Shake Maps In The Southern Alps-Dinarides Junction Area
AU: Suhadolc, P
EM: suhadolc@units.it
AF: Department of the Earth Sciences, University of Trieste, Via Weiss 1, Trieste, 34127, Italy
AU: * Costa, G
EM: costa@units.it
AF: Department of the Earth Sciences, University of Trieste, Via Weiss 1, Trieste, 34127, Italy
AU: Moratto, L
EM: morattol@dst.units.it
AF: Department of the Earth Sciences, University of Trieste, Via Weiss 1, Trieste, 34127, Italy
AU: Sandron, D
EM: dsandron@ogs.trieste.it
AF: Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Borgo Grotta Gigante, 42C, Trieste, 34010, Italy
AB: Shake maps are generated for the Southern Alps-Dinarides Junction area within 5 minutes from the earthquake occurrence. They are based on the TriNet "ShakeMap" software (Wald et al., 1999) interfaced with the Antelope real-time system (ARTS) installed at DST in the framework of an EU Interreg project. The system retrieves the real time waveforms and the results are posted automatically on the Department web pages (www.dst.units.it/RAF06). For the calibration of the Shake Maps regional model we use the NEHRP classification and two ground-motion relations for different magnitude ranges. The regional ground-motion relations (Costa et al., 2006), computed using strong-motion data recorded from the Friuli Venezia Giulia and the Italian National Accelerometric integrated network, are used for moderate (ML<6.3) events, whereas the Sabetta and Pugliese (1996) relation valid for the Italian territory is used for ML>6.3 events. The system has been successfully tested for medium to moderate events (ML<4.5) occurred in the area since January 2007. Ground-shaking synthetic scenarios are generated for three important past seismic events in the studied area: Cansiglio 1936, Friuli 1976 and Bovec 1998. The used synthetic seismograms are computed applying the reflectivity method (Kennett, 1981) at a cutoff frequency of 10 Hz. The satisfactory validation of these scenarios has been done by computing the misfit values between the observed and estimated accelerations, and the misfit values between the macroseismic observations (INGV-DBMI04 database) and the instrumental intensities derived from the application of different relationships (Wald et al., 1999; Faccioli and Cauzzi, 2006; Kastli and Fah, 2006).
UR: http://www.dst.units.it/RAF06
DE: 7212 Earthquake ground motions and engineering seismology
DE: 7215 Earthquake source observations (1240)
DE: 7294 Seismic instruments and networks (0935, 3025)
SC: Seismology [S]
MN: 2007 Fall Meeting