Paper Info
Title
Deformation and Related Slip Due to the 2011 Van Earthquake (Turkey) Sequence Imaged by SAR Data and Numerical Modeling.
Abstract
A Mw 7.1 earthquake struck the Eastern Anatolia, near the city of Van (Turkey), on 23 October 2011. We investigated the coseismic surface displacements using the InSAR technique, exploiting adjacent ENVISAT tracks and COSMO-SkyMed images. Multi aperture interferometry was also applied, measuring ground displacements in the azimuth direction. We solved for the fault geometry and mechanism, and we inverted the slip distribution employing a numerical forward model that includes the available regional structural data. Results show a horizontally elongated high slip area (7-9 m) at 12-17 km depth, while the upper part of the fault results unruptured, enhancing its seismogenic potential. We also investigated the post-seismic phase acquiring most of the available COSMO-SkyMed, ENVISAT and TERRASAR-X SAR images. The computed afterslip distributions show that the shallow section of the fault underwent considerable aseismic slip during the early days after the mainshock, of tens of centimeters. Our results support the hypothesis of a seismogenic potential reduction within the first 8-10 km of the fault through the energy release during the post-seismic phase. Despite non-optimal data coverage and coherence issues, we demonstrate that useful information about the Van earthquake could still be retrieved from SAR data through detailed analysis.
Year
DOI
Venue
2016
10.3390/rs8060532
REMOTE SENSING
Keywords
Field
DocType
SAR interferometry,multi aperture interferometry,Van earthquake,remote sensing,numerical modelling,inverse methods,coseismic deformation,post-seismic deformation
Aperture,Seismology,Interferometric synthetic aperture radar,Slip (materials science),Interferometry,Coherence (physics),Deformation (mechanics),Geology,Geodesy,Numerical modeling,Azimuth direction
Journal
Volume
Issue
Citations 
8
6
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Elisa Trasatti1123.34
Cristiano Tolomei2186.39
Giuseppe Pezzo311.98
Simone Atzori4215.54
Stefano Salvi5134.55