Bifurcations at the stability transition of earthquake faulting

Tectonic faults typically break in a single rupture mode within the range of styles from slow slip to dynamic earthquake failure. However, in increasingly well‐documented instances, the same fault segment fails in both slow and fast modes within a short period, as in the sequences that culminated in...

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Main Authors: Mele Veedu, Deepa, Giorgetti, Carolina, Scuderi, Marco, Barbot, Sylvain, Marone, Chris, Collettini, Cristiano
Other Authors: Earth Observatory of Singapore
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/146197
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1461972021-02-06T20:10:53Z Bifurcations at the stability transition of earthquake faulting Mele Veedu, Deepa Giorgetti, Carolina Scuderi, Marco Barbot, Sylvain Marone, Chris Collettini, Cristiano Earth Observatory of Singapore Science::General Slow Slip Earthquake Tectonic faults typically break in a single rupture mode within the range of styles from slow slip to dynamic earthquake failure. However, in increasingly well‐documented instances, the same fault segment fails in both slow and fast modes within a short period, as in the sequences that culminated in the 2011 Mw = 9.0 Tohoku‐Oki, Japan, and 2014 Mw = 8.2 Iquique, Chile, earthquakes. Why slow slip alternates with dynamic rupture in certain regions but not in others is not well understood. Here, we integrate laboratory experiments and numerical simulations to investigate the physical conditions leading to cycles where the two rupture styles alternate. We show that a bifurcation takes place near the stability transition with sequences encompassing various rupture modes under constant loading rate. The range of frictional instabilities and slip cycles identified in this study represents important end‐members to understand the interaction of slow and fast slip on the same fault segment. Ministry of Education (MOE) Published version This work is funded by the Earth Observatory of Singapore and by the Singapore Ministry of Education and also the 2017 Stephen Riady Funding from the Earth Observatory of Singapore (M4430260.B50.500000). 2021-02-01T07:31:36Z 2021-02-01T07:31:36Z 2020 Journal Article Mele Veedu, D., Giorgetti, C., Scuderi, M., Barbot, S., Marone, C., & Collettini, C. (2020). Bifurcations at the stability transition of earthquake faulting. Geophysical Research Letters, 47(19), e2020GL087985-. doi:10.1029/2020GL087985 0094-8276 https://hdl.handle.net/10356/146197 10.1029/2020GL087985 19 47 en M4430260.B50.500000 Geophysical Research Letters © 2020 American Geophysical Union. All rights reserved. This paper was published in Geophysical Research Letters and is made available with permission of American Geophysical Union. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::General
Slow Slip
Earthquake
spellingShingle Science::General
Slow Slip
Earthquake
Mele Veedu, Deepa
Giorgetti, Carolina
Scuderi, Marco
Barbot, Sylvain
Marone, Chris
Collettini, Cristiano
Bifurcations at the stability transition of earthquake faulting
description Tectonic faults typically break in a single rupture mode within the range of styles from slow slip to dynamic earthquake failure. However, in increasingly well‐documented instances, the same fault segment fails in both slow and fast modes within a short period, as in the sequences that culminated in the 2011 Mw = 9.0 Tohoku‐Oki, Japan, and 2014 Mw = 8.2 Iquique, Chile, earthquakes. Why slow slip alternates with dynamic rupture in certain regions but not in others is not well understood. Here, we integrate laboratory experiments and numerical simulations to investigate the physical conditions leading to cycles where the two rupture styles alternate. We show that a bifurcation takes place near the stability transition with sequences encompassing various rupture modes under constant loading rate. The range of frictional instabilities and slip cycles identified in this study represents important end‐members to understand the interaction of slow and fast slip on the same fault segment.
author2 Earth Observatory of Singapore
author_facet Earth Observatory of Singapore
Mele Veedu, Deepa
Giorgetti, Carolina
Scuderi, Marco
Barbot, Sylvain
Marone, Chris
Collettini, Cristiano
format Article
author Mele Veedu, Deepa
Giorgetti, Carolina
Scuderi, Marco
Barbot, Sylvain
Marone, Chris
Collettini, Cristiano
author_sort Mele Veedu, Deepa
title Bifurcations at the stability transition of earthquake faulting
title_short Bifurcations at the stability transition of earthquake faulting
title_full Bifurcations at the stability transition of earthquake faulting
title_fullStr Bifurcations at the stability transition of earthquake faulting
title_full_unstemmed Bifurcations at the stability transition of earthquake faulting
title_sort bifurcations at the stability transition of earthquake faulting
publishDate 2021
url https://hdl.handle.net/10356/146197
_version_ 1692012948080295936