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Authors: | Di Giulio, G.* Amoroso, S.* Di Naccio, D.* Falcucci, E.* Gori, S.* Hailemikael, S.* Vassallo, M.* Ciampaglia, A.* De Luca, G.* Del Grosso, A.* Di Marcantonio, P.* D'Onofrio, K.* Porreca, M.* Trotta, D.* Villani, F.* Milana, G.* |
Title: | The Seismic Microzonation of San Gregorio Through a Multidisciplinary Approach. Seismic Amplification in a Stiff Site | Editors: | Lollino, G Manconi, A Guzzetti, F Culshaw, M Bobrowsky, P Luino, F |
Issue Date: | 2014 | Keywords: | Urban Geology, Sustainable Planning, Landscape Exploitation | Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous | Abstract: | The village of San Gregorio (L'Aquila, Italy) was severely damaged by the April 6, 2009 earthquake. San Gregorio is situated at the base of a carbon- ate relief bounded by the Aterno river alluvial plain. The geological features of the area are very complex: jointed carbonate bedrock, cemented gravels and alluvial fan crop out in the village. Co-seismic ground fractures were seen along SW dip- ping active fault segments crossing San Gregorio. We integrated the microzona- tion studies with new geological, geotechnical and geophysical data for supporting the reconstruction planning of the village. Noise measurements show strong and polarized peaks in the horizontal-to-vertical spectral ratios (H/V) in the 3-7 Hz frequency band. Interestingly, the alluvial fan and the outcropping rock masses show both H/V peaks. To understand the influence of rock mass joint condition on site effect, we performed structural surveys on carbonate bedrock to look for a possible correlation between rock fracturing and ground-motion amplification |
Appears in Collections: | Conference materials |
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T5-IAEG2014_219.pdf | Extended abstract | 4.92 MB | Adobe PDF |
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