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Authors: Pischiutta, Marta* 
Villani, Fabio* 
D’Amico, S.* 
Vassallo, Maurizio* 
Cara, Fabrizio* 
Di Naccio, Deborah* 
Farrugia, D.* 
Di Giulio, Giuseppe* 
Amoroso, Sara* 
Cantore, Luciana* 
Mercuri, Alessia* 
Famiani, Daniela* 
Galea, P.* 
Akinci, Aybige* 
Rovelli, Antonio* 
Title: Results from shallow geophysical investigations in the northwestern sector of the island of Malta
Issue Date: 2017
Series/Report no.: /98 (2017)
DOI: 10.1016/j.pce.2016.10.013
Abstract: We performed geophysical investigations in the northwestern sector of the island of Malta to reconstruct velocity-depth models and provide shear-wave velocity profiles. We have chosen two sites, one located in Rabat (Malta) and another in the Golden Bay area. We used both active (seismic and electrical 2D-tomography, Multichanel Analysis of Surface Waves – MASW) and passive (2D arrays and single-station measurements using ambient noise) geophysical methods. Consistently with previous studies performed in this part of Malta, we have found that both sites are characterised by site resonance in the frequency range 1-2 Hz as an effect of the local lithostratigraphic succession that shows an impedance contrast at about 60-90 m depth. This resonance effect can have important implications on both seismic hazard as well as seismic risk evaluation of the region since the amplified frequency range coincides with the resonance frequencies typical of 5–10 storey buildings which are very diffuse in the Maltese Islands, especially after intense recent urbanization.
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