HR: 1330h
AN: S42E-0207    [PDF]
TI: Moment Tensor Summation in the Mediterranean Area Revisited: Comparison Between CMT and non-CMT Mechanisms Catalogs
AU: * Vannucci, G
EM: gfranco@ibogfs.df.unibo.it
AF: INGV-Istituto Nazionale di Geofisica e Vulcanologia, Via Donato Creti, 12, Bologna, I-40128 Italy
AU: Pondrelli, S
EM: pondrelli@ingv.it
AF: INGV-Istituto Nazionale di Geofisica e Vulcanologia, Via Donato Creti, 12, Bologna, I-40128 Italy
AU: Boschi, E
EM: boschi@ibogfs.df.unibo.it
AF: INGV-Istituto Nazionale di Geofisica e Vulcanologia, Via Donato Creti, 12, Bologna, I-40128 Italy
AU: Boschi, E
EM: boschi@ibogfs.df.unibo.it
AF: Dipartimento di Fisica, Universita' di Bologna, Viale Berti-Pichat 8, Bologna, I-40127 Italy
AU: Gasperini, P
EM: paolo@ibogfs.df.unibo.it
AF: Dipartimento di Fisica, Universita' di Bologna, Viale Berti-Pichat 8, Bologna, I-40127 Italy
AU: Morelli, A
EM: morelli@ingv.it
AF: INGV-Istituto Nazionale di Geofisica e Vulcanologia, Via Donato Creti, 12, Bologna, I-40128 Italy
AB: The analysis of focal mechanisms of the earthquakes is routinely carried out in all seismotectonic studies. For the Mediterranean area, a recently published database (EMMA) of checked first-motion focal mechanisms available from the literature allows to extend back in time, and to a lower magnitude threshold the data coverage of CMT and RCMT on-line catalogs (Harvard Seismology, Istituto Nazionale di Geofisica e Vulcanologia and Eidgen”ssische Technische Hochschule). On a regular grid with mesh of one degree, we mapped the behavior of cumulative moment tensor in terms of both equivalent mechanism and horizontal projections of P and T axes. We correlate the patterns resulting from CMT catalogs and EMMA database to verify the ability of the formers to well describe the seismic deformation in this area. We also analyzed the completeness of different datasets comparing their cumulative scalar moment release (seismic flux) with those resulting from the ISC and PDE catalogs. The contribution of EMMA database is found to be particularly significant in areas characterized by low or moderate seismicity.
DE: 1242 Seismic deformations (7205)
DE: 1734 Seismology
DE: 7215 Earthquake parameters
SC: Seismology [S]
MN: 2003 Fall Meeting