Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/11549
DC Field | Value | Language |
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dc.date.accessioned | 2018-03-27T09:30:34Z | en |
dc.date.available | 2018-03-27T09:30:34Z | en |
dc.date.issued | 2016-12 | en |
dc.identifier.uri | http://hdl.handle.net/2122/11549 | en |
dc.description.abstract | The 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.iso | English | en |
dc.relation.ispartof | Journal of Geophysical Research: Solid Earth | en |
dc.relation.ispartofseries | /121 (2016) | en |
dc.subject | laboratory experiments | en |
dc.subject | stick-slip experiments | en |
dc.title | On the evolution of elastic properties during laboratory stick-slip experiments spanning the transition from slow slip to dynamic rupture | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 8569-8594 | en |
dc.identifier.URL | https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016JB013545 | en |
dc.subject.INGV | 04. Solidi Earth | en |
dc.identifier.doi | 10.1002/2016JB013545 | en |
dc.description.obiettivoSpecifico | 2IT. Laboratori sperimentali e analitici | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | Tinti, Elisa | en |
dc.contributor.author | Scuderi, M. M. | en |
dc.contributor.author | Scognamiglio, Laura | en |
dc.contributor.author | Di Stefano, Giuseppe | en |
dc.contributor.author | Marone, C. | en |
dc.contributor.author | Collettini, Cristiano | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Dipartimento di Scienze della Terra, La Sapienza Università di Roma, Rome, Italy | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Department of Geoscience, Pennsylvania State University, University Park, Pennsylvania, USA | en |
dc.contributor.department | Dipartimento di Scienze della Terra, La Sapienza Università di Roma, Rome, Italy | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Università Roma La Sapienza | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Penn State, USA | - |
crisitem.author.dept | Università La Sapienza | - |
crisitem.author.orcid | 0000-0002-6942-3592 | - |
crisitem.author.orcid | 0000-0001-5232-0792 | - |
crisitem.author.orcid | 0000-0002-5437-5276 | - |
crisitem.author.orcid | 0000-0002-0845-9305 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
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2016_Tinti_et_al_JGR.pdf | 10.03 MB | Adobe PDF | View/Open |
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