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Authors: Villani, Fabio* 
Tulliani, Valerio* 
Sapia, Vincenzo* 
Fierro, Elisa* 
Civico, Riccardo* 
Baccheschi, Paola* 
Di Giulio, Giuseppe* 
Vassallo, Maurizio* 
Pantosti, Daniela* 
Title: Shallow subsurface imaging of the Piano di Pezza active normal fault (central Italy) using high-resolution refraction and electrical resistivity tomography coupled with time-domain electromagnetic data
Issue Date: 19-Apr-2015
Publisher: Miscellana INGV
Keywords: Central Apennines
Seismic refraction
electrical resistivity tomography
time-domain electromagnetic measurement
active fault
Subject Classification05. General::05.09. Miscellaneous::05.09.99. General or miscellaneous 
Abstract: The Piano di Pezza fault (PPF) is the north-westernmost segment of the >20 km long Ovindoli-Pezza active normal fault-system (central Italy). Although existing paleoseismic data document high vertical Holocene slip rates (~1 mm/yr) and a remarkable seismogenic potential of this fault, its subsurface setting and Pleistocene cumulative displacement are still unknown. We investigated the shallow subsurface of a key section of the PPF using seismic and electrical resistivity tomography coupled with time-domain electromagnetic measurements (TDEM). We provide 2-D Vp and resistivity images showing details of the fault structure and the geometry of the shallow basin infill down to 35-40 m depth. We can estimate the dip and the Holocene vertical displacement of the master fault. TDEM measurements in the fault hangingwall indicate that the pre-Quaternary carbonate basement may be found at ~90-100 m depth.
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