Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/9156
DC FieldValueLanguage
dc.contributor.authorallLiu, C.; University of Oxforden
dc.contributor.authorallBizzarri, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.authorallDas, S.; University of Oxforden
dc.date.accessioned2014-11-24T16:15:30Zen
dc.date.available2014-11-24T16:15:30Zen
dc.date.issued2014-11en
dc.identifier.urihttp://hdl.handle.net/2122/9156en
dc.description.abstractWe investigate numerically the passage of spontaneous, dynamic in-plane shear ruptures from initiation to their final rupture speed, using very fine grids. By carrying out more than 120 simulations, we identify two different mechanisms controlling supershear transition. For relatively weaker faults, the rupture speed always passes smoothly and continuously through the range of speeds between the Rayleigh and shear wave speeds (the formerly considered forbidden zone of rupture speeds). This, however, occurs in a very short time, before the ruptures reach the compressional wave speed. The very short time spent in this range of speeds may explain why a jump over these speeds was seen in some earlier numerical and experimental studies and confirms that this speed range is an unstable range, as predicted analytically for steady state, singular cracks. On the other hand, for relatively stronger faults, we find that a daughter rupture is initiated by the main (mother) rupture, ahead of it. The mother rupture continues to propagate at sub-Rayleigh speed and eventually merges with the daughter rupture, whose speed jumps over the Rayleigh to shear wave speed range. We find that this daughter rupture is essentially a “pseudorupture,” in that the two sides of the fault are already separated, but the rupture has negligible slip and slip velocity. After the mother rupture merges with it, the slip, the slip velocity, and the rupture speed become dominated by those of the mother rupture. The results are independent of grid sizes and of methods used to nucleate the initial rupture.en
dc.language.isoEnglishen
dc.publisher.nameAmerican Geophysical Unionen
dc.relation.ispartofJournal of geophysical research - solid earthen
dc.relation.ispartofseries/119 (2014)en
dc.subjectSeismic sourceen
dc.subjectSupershear rupturesen
dc.titleProgression of spontaneous in-plane shear faults from sub-Rayleigh to compressional wave rupture speedsen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber8331–8345en
dc.identifier.URLhttp://www.bo.ingv.it/~bizzarrien
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.06. Rheology, friction, and structure of fault zonesen
dc.identifier.doi10.1002/2014JB011187en
dc.description.obiettivoSpecifico4T. Fisica dei terremoti e scenari cosismicien
dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.relation.issn0148-0227en
dc.contributor.authorLiu, C.en
dc.contributor.authorBizzarri, A.en
dc.contributor.authorDas, S.en
dc.contributor.departmentUniversity of Oxforden
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.departmentUniversity of Oxforden
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptUniversity of Oxford-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.deptUniversity of Oxford-
crisitem.author.orcid0000-0001-8313-4124-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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