Surface creep rate of the southern San Andreas fault modulated by stress perturbations from nearby large events

A major challenge for understanding the physics of shallow fault creep has been to observe and model the long‐term effect of stress changes on creep rate. Here we investigate the surface creep along the southern San Andreas fault (SSAF) using data from interferometric synthetic aperture radar spanni...

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Main Authors: Xu, Xiaohua, Ward, Lauren A., Jiang, Junle, Smith‐Konter, Bridget, Tymofyeyeva, Ekaterina, Sylvester, Arthur G., Sandwell, David T., Lindsey, Eric Ostrom
Other Authors: Earth Observatory of Singapore
Format: Article
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/103513
http://hdl.handle.net/10220/47338
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1035132020-09-26T21:34:38Z Surface creep rate of the southern San Andreas fault modulated by stress perturbations from nearby large events Xu, Xiaohua Ward, Lauren A. Jiang, Junle Smith‐Konter, Bridget Tymofyeyeva, Ekaterina Sylvester, Arthur G. Sandwell, David T. Lindsey, Eric Ostrom Earth Observatory of Singapore San Andreas Fault Surface Creep DRNTU::Social sciences::Geography A major challenge for understanding the physics of shallow fault creep has been to observe and model the long‐term effect of stress changes on creep rate. Here we investigate the surface creep along the southern San Andreas fault (SSAF) using data from interferometric synthetic aperture radar spanning over 25 years (ERS 1992–1999, ENVISAT 2003–2010, and Sentinel‐1 2014–present). The main result of this analysis is that the average surface creep rate increased after the Landers event and then decreased by a factor of 2–7 over the past few decades. We consider quasi‐static and dynamic Coulomb stress changes on the SSAF due to these three major events. From our analysis, the elevated creep rates after the Landers can only be explained by static stress changes, indicating that even in the presence of dynamically triggered creep, static stress changes may have a long‐lasting effect on SSAF creep rates. Published version 2019-01-03T05:31:48Z 2019-12-06T21:14:19Z 2019-01-03T05:31:48Z 2019-12-06T21:14:19Z 2018 Journal Article Xu, X., Ward, L. A., Jiang, J., Smith‐Konter, B., Tymofyeyeva, E., Lindsey, E. O., . . . Sandwell, D. T. (2018). Surface creep rate of the southern San Andreas fault modulated by stress perturbations from nearby large events. Geophysical Research Letters, 45(19), 10,259-10,268. doi:10.1029/2018GL080137 0094-8276 https://hdl.handle.net/10356/103513 http://hdl.handle.net/10220/47338 10.1029/2018GL080137 en Geophysical Research Letters © 2018 American Geophysical Union. All rights reserved. This paper was published in Geophysical Research Letters and is made available with permission of American Geophysical Union. 10 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic San Andreas Fault
Surface Creep
DRNTU::Social sciences::Geography
spellingShingle San Andreas Fault
Surface Creep
DRNTU::Social sciences::Geography
Xu, Xiaohua
Ward, Lauren A.
Jiang, Junle
Smith‐Konter, Bridget
Tymofyeyeva, Ekaterina
Sylvester, Arthur G.
Sandwell, David T.
Lindsey, Eric Ostrom
Surface creep rate of the southern San Andreas fault modulated by stress perturbations from nearby large events
description A major challenge for understanding the physics of shallow fault creep has been to observe and model the long‐term effect of stress changes on creep rate. Here we investigate the surface creep along the southern San Andreas fault (SSAF) using data from interferometric synthetic aperture radar spanning over 25 years (ERS 1992–1999, ENVISAT 2003–2010, and Sentinel‐1 2014–present). The main result of this analysis is that the average surface creep rate increased after the Landers event and then decreased by a factor of 2–7 over the past few decades. We consider quasi‐static and dynamic Coulomb stress changes on the SSAF due to these three major events. From our analysis, the elevated creep rates after the Landers can only be explained by static stress changes, indicating that even in the presence of dynamically triggered creep, static stress changes may have a long‐lasting effect on SSAF creep rates.
author2 Earth Observatory of Singapore
author_facet Earth Observatory of Singapore
Xu, Xiaohua
Ward, Lauren A.
Jiang, Junle
Smith‐Konter, Bridget
Tymofyeyeva, Ekaterina
Sylvester, Arthur G.
Sandwell, David T.
Lindsey, Eric Ostrom
format Article
author Xu, Xiaohua
Ward, Lauren A.
Jiang, Junle
Smith‐Konter, Bridget
Tymofyeyeva, Ekaterina
Sylvester, Arthur G.
Sandwell, David T.
Lindsey, Eric Ostrom
author_sort Xu, Xiaohua
title Surface creep rate of the southern San Andreas fault modulated by stress perturbations from nearby large events
title_short Surface creep rate of the southern San Andreas fault modulated by stress perturbations from nearby large events
title_full Surface creep rate of the southern San Andreas fault modulated by stress perturbations from nearby large events
title_fullStr Surface creep rate of the southern San Andreas fault modulated by stress perturbations from nearby large events
title_full_unstemmed Surface creep rate of the southern San Andreas fault modulated by stress perturbations from nearby large events
title_sort surface creep rate of the southern san andreas fault modulated by stress perturbations from nearby large events
publishDate 2019
url https://hdl.handle.net/10356/103513
http://hdl.handle.net/10220/47338
_version_ 1681058699783700480