Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/10979
DC Field | Value | Language |
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dc.date.accessioned | 2018-03-05T13:43:05Z | en |
dc.date.available | 2018-03-05T13:43:05Z | en |
dc.date.issued | 2016-04-16 | en |
dc.identifier.uri | http://hdl.handle.net/2122/10979 | en |
dc.description.abstract | Empirically based rate-and-state friction laws (RSFLs) have been proposed to model the dependence of friction forces with slip and time. The relevance of the RSFL for earthquake mechanics is that few constitutive parameters define critical conditions for fault stability (i.e., critical stiffness and frictional fault behavior). However, the RSFLs were determined from experiments conducted at subseismic slip rates (V < 1 cm/s), and their extrapolation to earthquake deformation conditions (V > 0.1 m/s) remains questionable on the basis of the experimental evidence of (1) large dynamic weakening and (2) activation of particular fault lubrication processes at seismic slip rates. Here we propose a modified RSFL (MFL) based on the review of a large published and unpublished data set of rock friction experiments performed with different testing machines. The MFL, valid at steady state conditions from subseismic to seismic slip rates (0.1 µm/s < V < 3 m/s), describes the initiation of a substantial velocity weakening in the 1-20 cm/s range resulting in a critical stiffness increase that creates a peak of potential instability in that velocity regime. The MFL leads to a new definition of fault frictional stability with implications for slip event styles and relevance for models of seismic rupture nucleation, propagation, and arrest. | en |
dc.language.iso | English | en |
dc.relation.ispartof | Geophysical research letters | en |
dc.relation.ispartofseries | /43 (2016) | en |
dc.title | An empirically based steady state friction law and implications for fault stability | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 3263 – 3271 | en |
dc.identifier.doi | 10.1002/2016GL067881 | en |
dc.description.obiettivoSpecifico | 4T. Sismologia, geofisica e geologia per l'ingegneria sismica | en |
dc.description.obiettivoSpecifico | 2IT. Laboratori sperimentali e analitici | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | Spagnuolo, Elena | en |
dc.contributor.author | Nielsen, S. | en |
dc.contributor.author | Violay, M. | en |
dc.contributor.author | Di Toro, Giulio | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Department of Earth Sciences, University of Durham, Durham, United Kingdom | en |
dc.contributor.department | LEMR, ENAC, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | 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 | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Durham University, Durham, UK | - |
crisitem.author.dept | EPFL, LEMR, Lausanne, Switzerland | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.orcid | 0000-0002-1377-5812 | - |
crisitem.author.orcid | 0000-0002-9214-2932 | - |
crisitem.author.orcid | 0000-0002-7402-8263 | - |
crisitem.author.orcid | 0000-0002-6618-3474 | - |
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 | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
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Spagnuolo_et_al-2016-Geophysical_Research_Letters.pdf | 723.27 kB | Adobe PDF | View/Open |
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