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Authors: Chiarabba, C.* 
Frepoli, A.* 
Title: Minimum 1D velocity models in Central and Southern Italy: a contribution to better constrain hypocentral determinations
Issue Date: Aug-1997
Series/Report no.: 4/40 (1997)
Keywords: Earthquake location
1D velocity model
Italian peninsula
Subject Classification04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis 
04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques 
Abstract: We computed one-dimensional ( I D) velocity models and station corrections for Centrai and Southern Italy, in- verting re-picked P-wave alTival times recorded by the Istituto Nazionale di Geofisica seismic network. The re-picked data yield resolved P-wave velocity results and proved to be more suited than bulletin data for de- tailed tomographic studies. Using the improved velocity models, we relocated the most significant earthquakes which occurt.ed in the Apennines in the past 7 years, achieving constrained hypocentral determinations for events within most of the Apenninic belt. The interpretation of the obtained lD velocity models allows us to infer interesting features on the deep structure of the Apennines. Smooth velocity gradients with depth and low P-wave velocities are ob,'ierved beneath the Apennines. We believe that our results are effective to constrain hypocentral locations in Italy and may represent a first step towards more detailed seismotectonic analyses.
Appears in Collections:Annals of Geophysics

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