Publication Date:
2015-06-27
Description:
The Shahroud fault system is a major active structure in the Alborz range of NE Iran whose slip-rate is not well constrained despite its potential high seismic hazard. In order to constrain the slip-rate of the eastern Shahroud fault zone, we use space-borne SAR interferometry with both ascending and descending ENVISAT data to determine the rate of interseismic strain accumulation across the system. We invert the slip-rate from surface velocity measurements using a half-space elastic dislocation model. The modeling results are consistent with a left-lateral slip-rate of 4.75±0.8 mm/yr on the Abr and Jajarm, strands of the Shahroud fault, with a 10±4 km locking depth. This is in good agreement with the 4-6 mm/yr of left-lateral displacement rate accumulated across the total Shahroud fault system obtained from GPS measurements.
Print ISSN:
0094-8276
Electronic ISSN:
1944-8007
Topics:
Geosciences
,
Physics
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