Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3824304z&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 24, CiteID L24304
Physics
Seismology: Earthquake Ground Motions And Engineering Seismology (4302), Seismology: General Or Miscellaneous
Scientific paper
We retrieve seismic velocity variations within the Earth's crust in the region of L'Aquila (central Italy) by analyzing cross-correlations of more than two years of continuous seismic records. The studied period includes the April 6, 2009, Mw 6.1 L'Aquila earthquake. We observe a decrease of seismic velocities as a result of the earthquake's main shock. After performing the analysis in different frequency bands between 0.1 and 1 Hz, we conclude that the velocity variations are strongest at relatively high frequencies (0.5-1 Hz) suggesting that they are mostly related to the damage in the shallow soft layers resulting from the co-seismic shaking.
Faenza Licia
Michelini Alberto
Shapiro Nikolai M.
Soldati Gaia
Zaccarelli Lucia
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