Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1674
AuthorsChiarabba, C.* 
Amato, A.* 
TitleCrustal velocity structure of the Apennines (Italy) from P-wave travel time tomography
Issue DateDec-1996
Series/Report no.39/6
URIhttp://hdl.handle.net/2122/1674
KeywordsP-wave tomography
deep structure
Apennines
Subject Classification04. Solid Earth::04.06. Seismology::04.06.07. Tomography and anisotropy 
04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis 
AbstractIn this paper we provide P-wave velocity images of the crust underneath the Apennines (Italy), focusing on the lower crustal structure and the Moho topography. We inverted P-wave arrival times of earthquakes which occurred from 1986 to 1993 within the Apenninic area. To overcome inversion instabilities due to noisy data (we used bulletin data) we decided to resolve a minimum number of velocity parameters, inverting for only two layers in the crust and one in the uppermost mantle underneath the Moho. A partial inversion of only 55% of the overall dataset yields velocity images similar to those obtained with the whole data set, indicating that the depicted tomograms are stable and fairly insensitive to the number of data used. We find a low-velocity anomaly in the lower crust extending underneath the whole Apenninic belt. This feature is segmented by a relative high-velocity zone in correspondence with the Ortona-Roccamonfina line, that separates the northern from the southern Apenninic arcs. The Moho has a variable depth in the study area, and is deeper (more than 37 km) in the Adriatic side of the Northern Apennines with respect to the Tyrrhenian side, where it is found in the depth interval 22-34 km.
Appears in Collections:Annals of Geophysics

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