Abstract (max. 250 words) The integration of surface geological investigations with geophysical techniques is useful to characterize systems of active faults, whose anatomy is often complex. Integration of different geophysical methods has a key-role in yielding information on the underground geometry of the systems. We use an integrated analysis of geo-structural, seismological and gravimetric data and focus on the identification and geometrical description of faults, with associated density contrast, both at the surface and at depth. At the surface, this task is accomplished by a Multiscale Derivative Analysis (MDA) of the Bouguer anomaly map and by the integration of the MDA maps with the epicentral distribution and all the available geological information. The characterization of fault structures at depth is instead performed by the combination of the Depth from Extreme Points (DEXP) gravity imaging method with the hypocentral sections. Our multi-parametric approach was effectively applied to different seismically active regions of the Central Apennines, such as the area hit by the 2016-2017 Amatrice-Visso-Norcia seismic sequence (Central Italy) and the area of San Giuliano di Puglia (Southern Italy), struck by a moderate earthquake in October 2002.
The Role of Gravity Modeling in Seismotectonics Analysis / Fedi, M.; Florio, G.; Paoletti, V.; Nappi, R.; Gaudiosi, G.; Luiso, P.; Cella, F.. - (2019). (Intervento presentato al convegno CRUST Workshop in Memory of Gianpaolo Pialli tenutosi a Perugia nel 9-10 Luglio 2019).
The Role of Gravity Modeling in Seismotectonics Analysis
Fedi M.Supervision
;Florio G.
Writing – Original Draft Preparation
;Paoletti V.Writing – Review & Editing
;
2019
Abstract
Abstract (max. 250 words) The integration of surface geological investigations with geophysical techniques is useful to characterize systems of active faults, whose anatomy is often complex. Integration of different geophysical methods has a key-role in yielding information on the underground geometry of the systems. We use an integrated analysis of geo-structural, seismological and gravimetric data and focus on the identification and geometrical description of faults, with associated density contrast, both at the surface and at depth. At the surface, this task is accomplished by a Multiscale Derivative Analysis (MDA) of the Bouguer anomaly map and by the integration of the MDA maps with the epicentral distribution and all the available geological information. The characterization of fault structures at depth is instead performed by the combination of the Depth from Extreme Points (DEXP) gravity imaging method with the hypocentral sections. Our multi-parametric approach was effectively applied to different seismically active regions of the Central Apennines, such as the area hit by the 2016-2017 Amatrice-Visso-Norcia seismic sequence (Central Italy) and the area of San Giuliano di Puglia (Southern Italy), struck by a moderate earthquake in October 2002.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
