000015237 001__ 15237
000015237 005__ 20161115100215.0
000015237 04107 $$aeng
000015237 046__ $$k2016-08-21
000015237 100__ $$aHiggins, Natalie
000015237 24500 $$aExploring models of foreshock sources using rate-and-state friction

000015237 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000015237 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000015237 506__ $$arestricted
000015237 520__ $$2eng$$aMany large earthquakes are preceded by foreshocks, which are understood to occur within the nucleating region of the mainshock. How are these precursory events able to occur without immediately triggering the larger event? In this study, earthquake nucleation is investigated numerically via simulations of earthquake cycles with foreshocks occurring on a rate-and-state fault. Inspired by the asperity interpretation of foreshock sources from laboratory observations, the models presented here have heterogeneous fault properties with patches that are under higher compression and/or smoother. In this unique model, mainshocks occur in the larger-scale velocity-weakening region and foreshocks can occur on the embedded patches. The results show that the rate-and-state models of foreshock sources are suitable for producing isolated foreshocks under the right conditions of scale separation. In addition, despite the wide variation in patch parameters implemented, remarkably, stress drops of the foreshocks are consistent with laboratory and field observations and are approximately constant.

000015237 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015237 653__ $$a

000015237 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000015237 720__ $$aHiggins, Natalie
000015237 8560_ $$ffischerc@itam.cas.cz
000015237 8564_ $$s223245$$uhttps://invenio.itam.cas.cz/record/15237/files/TS.SM06-1.03.pdf$$yOriginal version of the author's contribution as presented on CD,  page 2148, code TS.SM06-1.03
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000015237 962__ $$r13812
000015237 980__ $$aPAPER