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http://hdl.handle.net/2122/7304| Authors: | Zaccarelli, L.* Shapiro, N. M.* Faenza, L.* Soldati, G.* Michelini, A.* |
Title: | Variations of crustal elastic properties during the 2009 L’Aquila earthquake inferred from cross correlations of ambient seismic noise | Journal: | Geophysical Researh Letters | Series/Report no.: | /38 (2011) | Publisher: | American Geophysical Union | Issue Date: | 2011 | DOI: | 10.1029/2011GL049750 | Keywords: | seismic noise L'Aquila Earthquake |
Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis | Abstract: | 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 seis- mic records. The studied period includes the April 6, 2009, Mw 6.1 L’Aquila earthquake. We observe a decrease of seis- mic 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 varia- tions 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 |
| Appears in Collections: | Article published / in press |
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| 2011GRL_zaccarelli-etal.pdf | Main article | 1.49 MB | Adobe PDF |
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