TY - GEN
T1 - The interpretation of BAM fault kinematics using Envisat SAR interferometric data
AU - Perski, ZA
AU - Hanssen, RF
N1 - Conference in 2005, paper uitgegeven in 2006.
PY - 2006
Y1 - 2006
N2 - The surface ruptures caused by the 26 December 2003 earthquake which affected the city of Bam (Kerman province, southeast Iran) have already been mapped using interferometric coherence images from Envisat SAR images. The clearly visible traces of these structures in the coherence images allow to prove that the Bam earthquake has been caused by the displacement along a previously unknown fault. Besides the coherence, the SAR interferograms of the ascending and descending orbits present a very complex deformation pattern especially north of Bam. Similar patterns have been observed in two independent datasets (ascending and descending) avoiding misinterpretation as atmospheric errors. Interferograms and derived deformation maps allow to interpret such structures in detail as a system of possible fractures and small faults accompanying the main rupture. Geocoded interferograms allow to trace in detail the direction of these structures, while deformation maps of ascending and descending passes allow the interpretation of their relative movement. The obtained pattern together with the structures mapped from the coherence images gives an opportunity to reconstruct the kinematics of the entire "Bam structure" and find its relation to the kinematics of the major intra-continental strike-slip system of the Gowk fault.
AB - The surface ruptures caused by the 26 December 2003 earthquake which affected the city of Bam (Kerman province, southeast Iran) have already been mapped using interferometric coherence images from Envisat SAR images. The clearly visible traces of these structures in the coherence images allow to prove that the Bam earthquake has been caused by the displacement along a previously unknown fault. Besides the coherence, the SAR interferograms of the ascending and descending orbits present a very complex deformation pattern especially north of Bam. Similar patterns have been observed in two independent datasets (ascending and descending) avoiding misinterpretation as atmospheric errors. Interferograms and derived deformation maps allow to interpret such structures in detail as a system of possible fractures and small faults accompanying the main rupture. Geocoded interferograms allow to trace in detail the direction of these structures, while deformation maps of ascending and descending passes allow the interpretation of their relative movement. The obtained pattern together with the structures mapped from the coherence images gives an opportunity to reconstruct the kinematics of the entire "Bam structure" and find its relation to the kinematics of the major intra-continental strike-slip system of the Gowk fault.
KW - conference contrib. refereed
KW - Conf.proc. > 3 pag
UR - http://earth.esa.int/workshops/fringe05/proceedings/toc_clean.html
M3 - Conference contribution
SN - 92-9092-921-9
VL - 610
BT - Proceedings of Fringe 2005 Workshop, 28 November - 2 December 2005, Frascati, Italy
A2 - H. Lacoste, null
PB - ESA Publications Division
CY - Noordwijk
T2 - Fringe 2005 Workshop
Y2 - 28 November 2005 through 2 December 2005
ER -