Please use this identifier to cite or link to this item:
Authors: Barberi, G.* 
Cosentino, M. T.* 
Gervasi, A.* 
Guerra, I.* 
Neri, G.* 
Orecchio, B.* 
Title: Crustal seismic tomography in the Calabrian Arc region, south Italy
Issue Date: 15-Dec-2004
Series/Report no.: 4/147(2004)
Keywords: Seismic tomography
Crustal structure
Italy and Tyrrhenian sea
Subject Classification04. Solid Earth::04.06. Seismology::04.06.07. Tomography and anisotropy 
Abstract: 27,646 P- and 15,025 S-wave readings obtained from 2238 earthquakes and 84 artificial sources were used to perform tomographic inversion of P velocity and VP/ VS ratio in the crust of Calabrian Arc by Thurber´s inversion algorithm. For this investigation a seismic database with more than twelve-thousand events was built, including all local earthquake data recorded between 1978 and 2001 at all stations of the national and local networks in south Italy. Spread Function computations and checkerboard and restore tests proved higher accuracy of velocity estimates in the upper 40 km beneath Calabrian Arc compared to previous investigations in the same area. The obtained three-dimensional velocity model furnished remarkable improvement of hypocenter locations of the global earthquake dataset (RMS reduction of 38% respect to 1D locations) and greater accuracy in the definition of microplates and tectonic units in the study region. Velocity domains evidenced by our tomography correspond to tectonic units locally identified with geological methods by previous investigators and allow us to better detail their shape and geometry at depth. In particular, at a depth of about 20 km beneath Calabria we detected the deep contact between the overthrusting Tyrrhenian crust and the subducting Ionian slab, improving the accuracy of the current subduction model of the Calabrian Arc region.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
915 Barberi et al..pdf1.46 MBAdobe PDFView/Open
Elsevier.html520 BHTMLView/Open
Show full item record

Page view(s)

Last Week
Last month
checked on Jul 18, 2018


checked on Jul 18, 2018

Google ScholarTM