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Authors: Mullick, M.*
Riguzzi, F.*
Mukhopadhyay, D.*
Title: Estimates of motion and strain rates across active faults in the frontal part of eastern Himalayas in North Bengal from GPS measurements
Title of journal: Terra Nova
Series/Report no.: 5/21 (2009)
Publisher: Blackwell
Issue Date: Oct-2009
DOI: 10.1111/j.1365-3121.2009.00898.x
Keywords: GPS
North Bengal
Gish fault
strain rate
Abstract: Within the 2500 km stretch of the Himalayas, a narrow window between longitudes 88.185 E and 88.936 E in the frontal Himalayas in North Bengal, crisscrossed by several active fault traces, presents an interesting region for crustal deformation study. We have estimated velocities of 8 GPS stations located in this area and the accumulating strain rate by two different methods. A total shortening of 11.1 ± 1.5 mm yr)1 is occurring across a set of four E–W running faults: Gorubathan, Matiali, Chalsa and Baradighi. The strain rate becomes higher in the NE part of the network, reaching )(0.25 ± 0.12) lstrain yr)1 with azimuth 21 . A statistically significant extension of 10.9 ± 1.6 mm yr)1 is estimated across the Gish transverse fault with a maximum strain rate of 0.36 ± 0.08 lstrain yr)1 with azimuth 103 . The accumulating strain will be probably released through future earthquakes.
Appears in Collections:04.03.01. Crustal deformations
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