期刊
GEOPHYSICAL RESEARCH LETTERS
卷 43, 期 16, 页码 8399-8406出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL070121
关键词
InSAR; strain accumulation; fault creep; plate motion; Chaman Fault; earthquake hazard
资金
- NASA's Earth Surface and Interior program
- National Science Foundation's (NSF) Tectonics program [NNX09AK72G, EAR-1019847]
- NSF
- NASA under NSF [EAR-1261833]
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 29N we find long-term slip rates of 162.3mm/yr for the Ghazaband Fault and of 83.1mm/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 340km long segment displaying aseismic surface creep along the Chaman Fault, with maximum surface creep rate of 8.12mm/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.
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