{"id":16542,"date":"2023-02-06T08:47:23","date_gmt":"2023-02-06T07:47:23","guid":{"rendered":"https:\/\/www.cerege.fr\/?post_type=tribe_events&p=16542"},"modified":"2023-02-06T14:36:54","modified_gmt":"2023-02-06T13:36:54","slug":"seminaire-tp-yannick-caniven-universite-doxford","status":"publish","type":"tribe_events","link":"https:\/\/www.cerege.fr\/fr\/agenda\/seminaire-tp-yannick-caniven-universite-doxford\/","title":{"rendered":"S\u00e9minaire T&P : Yannick Caniven, Universit\u00e9 d\u2019Oxford."},"content":{"rendered":"
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What controls the fault slip velocity during\u00a0 & slow earthquakes? Insights from a granular mechanics model.<\/h2>\n

R\u00e9sum\u00e9 :<\/em><\/h3>\n<\/div>\n
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Why do fast earthquakes accelerate dramatically while slow ones are not able to? In this study, we explore the physical origins of various types of events in a particle-based simulation of fault slip. Our model simulates a vertical crustal strike-slip fault in two dimensions, viewed from the top. We use an assemblage of about 14,000 particles, bonded to impart cohesion at all contacts except along a pre-defined fault line of 50 km length. We characterize the scaling laws that emerge from analyses between strain, stress and slip velocity during individual slip events within the fault zone. We examine 10 slow and fast earthquakes and identify several persistent behaviors and scaling relationships. First, we find that peak slip-velocity correlates with friction drop scaled by the preseismic rupture nucleation length. The best fit is a power law. Additionally, we find that during each rupture, shear stress decreases roughly linearly with slip. The weakening at an individual location persists throughout the event, even when the rupture tip has passed far beyond that location. Finally, we find that the initial absolute stress state correlates only weakly with the slip velocity peak, although an overall trend cannot be ignored. We explore some of the physical origins of these scaling relationships and discuss the implications for earthquake rupture processes.<\/p>\n<\/div>\n<\/div>\n

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Ce s\u00e9minaire T&P est ouvert \u00e0 tout le monde et sera \u00e9galement accessible via zoom avec le lien suivant :
\nhttps:\/\/univ-amu-fr.zoom.us\/j\/88293868736?pwd=Qnd0Z0k0UjJsNzl2dUREWnF4QVViQT09<\/a><\/p>\n

Ce s\u00e9minaire fait partie de la s\u00e9rie de s\u00e9minaires pour des candidats au poste de Ma\u00eetre de conf\u00e9rences ouvert en section 35 (Profil : Dynamique des surfaces continentales en r\u00e9ponse aux for\u00e7ages tectoniques et\/ou climatiques) pour le CEREGE cette ann\u00e9e.<\/p>\n","protected":false},"excerpt":{"rendered":"

Why do fast earthquakes accelerate dramatically while slow ones are not able to? In this study, we explore the physical origins of various types of events in a particle-based simulation of fault slip. Our model simulates a vertical crustal strike-slip fault in two dimensions, viewed from the top. We use an assemblage of about 14,000 particles, bonded to impart cohesion at all contacts except along a pre-defined fault line of 50 km length.<\/p>\n","protected":false},"author":724,"featured_media":0,"template":"","meta":{"_acf_changed":false,"_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[59],"class_list":["post-16542","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-seminaire","cat_seminaire"],"acf":[],"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/tribe_events\/16542","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/tribe_events"}],"about":[{"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/types\/tribe_events"}],"author":[{"embeddable":true,"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/users\/724"}],"version-history":[{"count":5,"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/tribe_events\/16542\/revisions"}],"predecessor-version":[{"id":16550,"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/tribe_events\/16542\/revisions\/16550"}],"wp:attachment":[{"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/media?parent=16542"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/tags?post=16542"},{"taxonomy":"tribe_events_cat","embeddable":true,"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/tribe_events_cat?post=16542"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}