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InSAR observations of strain accumulation and fault creep along the Chaman Fault system, Pakistan and Afghanistan

Fattahi, Heresh and Amelung, Falk (2016) InSAR observations of strain accumulation and fault creep along the Chaman Fault system, Pakistan and Afghanistan. Geophysical Research Letters, 43 (16). pp. 8399-8406. ISSN 0094-8276. http://resolver.caltech.edu/CaltechAUTHORS:20161103-122534255

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Abstract

We use 2004–2011 Envisat synthetic aperture radar imagery and InSAR time series methods to estimate the contemporary rates of strain accumulation in the Chaman Fault system in Pakistan and Afghanistan. At 29 N we find long-term slip rates of 16 ± 2.3 mm/yr for the Ghazaband Fault and of 8 ± 3.1 mm/yr for the Chaman Fault. This makes the Ghazaband Fault one of the most hazardous faults of the plate boundary zone. We further identify a 340 km long segment displaying aseismic surface creep along the Chaman Fault, with maximum surface creep rate of 8.1 ± 2 mm/yr. The observation that the Chaman Fault accommodates only 30% of the relative plate motion between India and Eurasia implies that the remainder is accommodated south and east of the Katawaz block microplate.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/2016GL070121DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/2016GL070121/abstractPublisherArticle
ORCID:
AuthorORCID
Fattahi, Heresh0000-0001-6926-4387
Additional Information:© 2016 American Geophysical Union. Received 20 JUN 2016; Accepted 19 JUL 2016; Accepted article online 22 JUL 2016; Published online 18 AUG 2016. SAR data were provided by the European Space Agency (ESA) and made available via the Seamless SAR Archive, a service provided by the UNAVCO facility. Funding was provided by NASA's Earth Surface and Interior program and the National Science Foundation's (NSF) Tectonics program (NNX09AK72G and EAR-1019847). The UNAVCO Facility is supported by the NSF and NASA under NSF Cooperative Agreement EAR-1261833.
Funders:
Funding AgencyGrant Number
NASANNX09AK72G
NSFEAR-1019847
NSFEAR-1261833
Subject Keywords:InSAR; strain accumulation; fault creep; plate motion; Chaman Fault; earthquake hazard
Record Number:CaltechAUTHORS:20161103-122534255
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20161103-122534255
Official Citation:Fattahi, H., and F. Amelung (2016), InSAR observations of strain accumulation and fault creep along the Chaman Fault system, Pakistan and Afghanistan, Geophys. Res. Lett., 43, 8399–8406, doi:10.1002/2016GL070121
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71708
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:03 Nov 2016 19:40
Last Modified:03 Mar 2017 19:12

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