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Pore-pressure migration along a normal-fault system resolved by time-repeated seismic tomography

2009; Geological Society of America; Volume: 37; Issue: 1 Linguagem: Inglês

10.1130/g25220a.1

1943-2682

C. Chiarabba, Pasquale De Gori, E. Boschi,

Seismic Waves and Analysis

Research Article| January 01, 2009 Pore-pressure migration along a normal-fault system resolved by time-repeated seismic tomography Claudio Chiarabba; Claudio Chiarabba * 1Istituto Nazionale di Geofisica e Vulcanologia, via di Vigna Murata 605, 00143 Rome, Italy *E-mail: chiarabba@ingv.it. 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 Enzo Boschi Enzo Boschi 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 Claudio Chiarabba * 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 Enzo Boschi 1Istituto Nazionale di Geofisica e Vulcanologia, via di Vigna Murata 605, 00143 Rome, Italy *E-mail: chiarabba@ingv.it. Publisher: Geological Society of America Received: 16 Jun 2008 Revision Received: 09 Sep 2008 Accepted: 19 Sep 2008 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2009 Geological Society of America Geology (2009) 37 (1): 67–70. https://doi.org/10.1130/G25220A.1 Article history Received: 16 Jun 2008 Revision Received: 09 Sep 2008 Accepted: 19 Sep 2008 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Claudio Chiarabba, Pasquale De Gori, Enzo Boschi; Pore-pressure migration along a normal-fault system resolved by time-repeated seismic tomography. Geology 2009;; 37 (1): 67–70. doi: https://doi.org/10.1130/G25220A.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 In this study, we outline the space and time variations of body-wave velocities during one of the best-documented series of normal-faulting earthquakes, the 1997 Umbria-Marche sequence in central Italy. We show the first ever observations of rock fracturing and fluid overpressure propagation along a fault system by using space-time resolved variations of Vp/Vs anomalies (four-dimensional variations) that accompany earthquake migration and precede large aftershocks. The Vp/Vs increase observed before the mid-October earthquakes was related to a pore-pressure increase on fluid-filled cracks in the volume around the fault. We also document that such variations are measurable only by using S-and P-wave arrival times. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.