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Site response study in Abruzzo (Central Italy): Underground array versus surface stations
Language
English
Obiettivo Specifico
7T. Struttura della Terra e geodinamica
Status
Published
JCR Journal
N/A or not JCR
Peer review journal
Yes
Title of the book
Issue/vol(year)
/2 (1998)
Pages (printed)
223-236
Issued date
1998
Abstract
In this site response study we examined local earthquakes recorded at surface stations of a local seismic network
and at a temporary underground seismic array installed in a tunnel underneath the Gran Sasso Massif in Abruzzo
(central Italy). This allowed us to compare the seismic site response beneath the mountain and on the surface in
similar geological environment (soft rock sites). We applied spectral ratios method on different segments of the
seismograms and used different reference spectra in the 1–20 Hz frequency band.
We found little or no amplification effects at most of the surface stations whereas site transfer functions evaluated
with respect to underground sites show an amplification factor up to 6 in the 1–8 Hz frequency range. Coda
spectral ratios estimated at soft rock sites are confirmed as good estimates of shear wave transfer function.
and at a temporary underground seismic array installed in a tunnel underneath the Gran Sasso Massif in Abruzzo
(central Italy). This allowed us to compare the seismic site response beneath the mountain and on the surface in
similar geological environment (soft rock sites). We applied spectral ratios method on different segments of the
seismograms and used different reference spectra in the 1–20 Hz frequency band.
We found little or no amplification effects at most of the surface stations whereas site transfer functions evaluated
with respect to underground sites show an amplification factor up to 6 in the 1–8 Hz frequency range. Coda
spectral ratios estimated at soft rock sites are confirmed as good estimates of shear wave transfer function.
Type
article
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deluca-diluccioJofS1998.pdf
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