Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/9545
Authors: | Malagnini, L.* Herrmann, R. B.* Munafò, I.* Buttinelli, M.* Anselmi, M.* Akinci, A.* Boschi, E.* |
Title: | The 2012 Ferrara seismic sequence: Regional crustal structure, earthquake sources, and seismic hazard | Journal: | Geophysical Research Letters | Series/Report no.: | /39 (2012) | Publisher: | American Geophysical Union | Issue Date: | 2012 | DOI: | 10.1029/2012GL053214 | Keywords: | earthquake sources, seismic hazard | Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics | Abstract: | Inadequate seismic design codes can be dangerous, particularly when they underestimate the true hazard. In this study we use data from a sequence of moderate-sized earthquakes in northeast Italy to validate and test a regional wave propagation model which, in turn, is used to under- stand some weaknesses of the current design spectra. Our velocity model, while regionalized and somewhat ad hoc, is consistent with geophysical observations and the local geology. In the 0.02–0.1 Hz band, this model is validated by using it to calculate moment tensor solutions of 20 earth- quakes (5.6 MW 3.2) in the 2012 Ferrara, Italy, seismic sequence. The seismic spectra observed for the relatively small main shock significantly exceeded the design spectra to be used in the area for critical structures. Observations and synthetics reveal that the ground motions are dominated by long-duration surface waves, which, apparently, the design codes do not adequately anticipate. In light of our results, the present seismic hazard assessment in the entire Pianura Padana, including the city of Milan, needs to be re-evaluated. Citation: Malagnini, L., R. B. Herrmann, I. Munafò, M. Buttinelli, M. Anselmi, A. Akinci, and E. Boschi (2012), The 2012 Ferrara seismic sequence: Regional crustal structure, earthquake sources, and seismic hazard, Geophys. Res. Lett., 39, L19302, doi:10.1029/ 2012GL053214. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
The 2012 Ferrara seismic sequence: Regional crustal structure, earthquake sources, and seismic hazard.pdf | Main article | 1.8 MB | Adobe PDF | View/Open |
WEB OF SCIENCETM
Citations
35
checked on Feb 10, 2021
Page view(s) 50
885
checked on Apr 24, 2024
Download(s) 50
172
checked on Apr 24, 2024