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Research Article| November 01, 2010 Temporal variation of seismic velocity and anisotropy before the 2009 MW 6.3 L'Aquila earthquake, Italy Francesco Pio Lucente; Francesco Pio Lucente 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Search for other works by this author on: GSW Google Scholar Pasquale De Gori; Pasquale De Gori 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Search for other works by this author on: GSW Google Scholar Lucia Margheriti; Lucia Margheriti 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Search for other works by this author on: GSW Google Scholar Davide Piccinini; Davide Piccinini 2Istituto Nazionale di Geofisica e Vulcanologia, Via Uguccione della Faggiola 32, 56126 Pisa, Italy Search for other works by this author on: GSW Google Scholar Massimo Di Bona; Massimo Di Bona 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Search for other works by this author on: GSW Google Scholar Claudio Chiarabba; Claudio Chiarabba 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Search for other works by this author on: GSW Google Scholar Nicola Piana Agostinetti Nicola Piana Agostinetti 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Search for other works by this author on: GSW Google Scholar Author and Article Information Francesco Pio Lucente 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Pasquale De Gori 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Lucia Margheriti 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Davide Piccinini 2Istituto Nazionale di Geofisica e Vulcanologia, Via Uguccione della Faggiola 32, 56126 Pisa, Italy Massimo Di Bona 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Claudio Chiarabba 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Nicola Piana Agostinetti 1Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy Publisher: Geological Society of America Received: 10 Jun 2010 Revision Received: 15 Jun 2010 Accepted: 22 Jun 2010 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2010 Geological Society of America Geology (2010) 38 (11): 1015–1018. https://doi.org/10.1130/G31463.1 Article history Received: 10 Jun 2010 Revision Received: 15 Jun 2010 Accepted: 22 Jun 2010 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Francesco Pio Lucente, Pasquale De Gori, Lucia Margheriti, Davide Piccinini, Massimo Di Bona, Claudio Chiarabba, Nicola Piana Agostinetti; Temporal variation of seismic velocity and anisotropy before the 2009 MW 6.3 L'Aquila earthquake, Italy. Geology 2010;; 38 (11): 1015–1018. doi: https://doi.org/10.1130/G31463.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract We describe a set of seismological observations of the foreshock sequence preceding the 6 April 2009 Mw 6.3 L'Aquila earthquake. The dense configuration of the seismic network in the epicenter area and the occurrence of a long foreshock sequence provide the opportunity for a detailed reconstruction of the preparatory phase of the main shock. Approaching the earthquake, we observed clear variations in the seismic wave propagation properties. The elastic properties of rocks in the fault region underwent a sharp change about a week before the earthquake. From our observations, we infer that a complex sequence of dilatancy-diffusion processes takes place and that fluids play a key role in the fault failure process. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.