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Title: Characterization of nucleation during laboratory earthquakes
Authors: Latour, S.
Schubnel, A.
Nielsen, S.
Madariaga, R.
Vinciguerra, S.
First Published: 16-Oct-2013
Publisher: American Geophysical Union (AGU), Wiley
Citation: Geophysical Research Letters, 2013, 40 (19), pp. 5064-5069 (6)
Abstract: We observe the nucleation phase of in-plane ruptures in the laboratory. We show that the nucleation is composed of two distinct phases, a quasi-static and an acceleration stage, followed by dynamic propagation. We propose an empirical model which describes the rupture length evolution: The quasi-static phase is described by an exponential growth while the acceleration phase is described by an inverse power law of time. The transition from quasi-static to accelerating rupture is related to the critical nucleation length, which scales inversely with normal stress in accordance with theoretical predictions, and to a critical surfacic power, which may be an intrinsic property of the interface. Finally, we discuss these results in the frame of previous studies and propose a scaling up to natural earthquake dimensions.
DOI Link: 10.1002/grl.50974
ISSN: 0094-8276
eISSN: 1944-8007
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Archived with reference to SHERPA/RoMEO and publisher website.
Appears in Collections:Published Articles, Dept. of Geology

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