Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5365
AuthorsBindi, D.* 
Pacor, F.* 
Luzi, L.* 
Massa, M.* 
Ameri, G.* 
TitleThe Mw 6.3, 2009 L’Aquila earthquake: source, path and site effects from spectral analysis of strong motion data
Issue Date2009
Series/Report no./179 (2009)
DOI10.1111/j.1365-246X.2009.04392.x
URIhttp://hdl.handle.net/2122/5365
KeywordsGeneralized inversion
strong-motion
Subject Classification04. Solid Earth::04.06. Seismology::04.06.04. Ground motion 
AbstractThe strong motion data of 2009 April 6 L’Aquila (Central Italy) earthquake (Mw = 6.3) and of 12 aftershocks (4.1 ≤ Mw ≤ 5.6) recorded by 56 stations of the Italian strong motion network are spectrally analysed to estimate the source parameters, the seismic attenuation, and the site amplification effects. The obtained source spectra for S wave have stress drop values ranging from 2.4 to 16.8 MPa, being the stress drop of the main shock equal to 9.2 MPa. The spectral curves describing the attenuation with distance show the presence of shoulders and bumps, mainly around 50 and 150 km, as consequence of significant reflected and refracted arrivals from crustal interfaces. The attenuation in the first 50 km is well described by a quality factor equal to Q( f ) = 59 f 0.56 obtained by fixing the geometrical spreading exponent to 1. Finally, the horizontal-to-vertical spectral ratio provides unreliable estimates of local site effects for those stations showing large amplifications over the vertical component of motion.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Bindi_et_al_GJI_2009_sub.pdfSubmitted article3.74 MBAdobe PDFView/Open
Show full item record

Page view(s)

130
Last Week
0
Last month
1
checked on Aug 19, 2017

Download(s)

199
checked on Aug 19, 2017

Google ScholarTM

Check

Altmetric