Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/11549
DC FieldValueLanguage
dc.date.accessioned2018-03-27T09:30:34Zen
dc.date.available2018-03-27T09:30:34Zen
dc.date.issued2016-12en
dc.identifier.urihttp://hdl.handle.net/2122/11549en
dc.description.abstractThe physical mechanisms governing slow earthquakes remain unknown, as does the relationship between slow and regular earthquakes. To investigate the mechanism(s) of slow earthquakes and related quasi‐dynamic modes of fault slip we performed laboratory experiments on simulated fault gouge in the double direct shear configuration. We reproduced the full spectrum of slip behavior, from slow to fast stick slip, by altering the elastic stiffness of the loading apparatus (k) to match the critical rheologic stiffness of fault gouge (kc). Our experiments show an evolution from stable sliding, when k > kc, to quasi‐dynamic transients when k ~ kc, to dynamic instabilities when k < kc. To evaluate the microphysical processes of fault weakening we monitored variations of elastic properties. We find systematic changes in P wave velocity (Vp) for laboratory seismic cycles. During the coseismic stress drop, seismic velocity drops abruptly, consistent with observations on natural faults. In the preparatory phase preceding failure, we find that accelerated fault creep causes a Vp reduction for the complete spectrum of slip behaviors. Our results suggest that the mechanics of slow and fast ruptures share key features and that they can occur on same faults, depending on frictional properties. In agreement with seismic surveys on tectonic faults our data show that their state of stress can be monitored by Vp changes during the seismic cycle. The observed reduction in Vp during the earthquake preparatory phase suggests that if similar mechanisms are confirmed in nature high‐resolution monitoring of fault zone properties may be a promising avenue for reliable detection of earthquake precursors.en
dc.language.isoEnglishen
dc.relation.ispartofJournal of Geophysical Research: Solid Earthen
dc.relation.ispartofseries/121 (2016)en
dc.subjectlaboratory experimentsen
dc.subjectstick-slip experimentsen
dc.titleOn the evolution of elastic properties during laboratory stick-slip experiments spanning the transition from slow slip to dynamic ruptureen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber8569-8594en
dc.identifier.URLhttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016JB013545en
dc.subject.INGV04. Solidi Earthen
dc.identifier.doi10.1002/2016JB013545en
dc.description.obiettivoSpecifico2IT. Laboratori sperimentali e analiticien
dc.description.journalTypeJCR Journalen
dc.contributor.authorTinti, Elisaen
dc.contributor.authorScuderi, M. M.en
dc.contributor.authorScognamiglio, Lauraen
dc.contributor.authorDi Stefano, Giuseppeen
dc.contributor.authorMarone, C.en
dc.contributor.authorCollettini, Cristianoen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italiaen
dc.contributor.departmentDipartimento di Scienze della Terra, La Sapienza Università di Roma, Rome, Italyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italiaen
dc.contributor.departmentDepartment of Geoscience, Pennsylvania State University, University Park, Pennsylvania, USAen
dc.contributor.departmentDipartimento di Scienze della Terra, La Sapienza Università di Roma, Rome, Italyen
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.fulltextWith Fulltext-
item.openairetypearticle-
item.grantfulltextrestricted-
crisitem.author.deptUniversità Roma La Sapienza-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptPenn State, USA-
crisitem.author.deptUniversità La Sapienza-
crisitem.author.orcid0000-0002-6942-3592-
crisitem.author.orcid0000-0001-5232-0792-
crisitem.author.orcid0000-0002-5437-5276-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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