Surface displacement measurements and fault slip models for the 1997 Mw 7.2 Zirkuh earthquake

<p><strong>Source models of the 1997 Mw 7.2 Zirkuh earthquake inferred from InSAR and optical correlation displacement field&nbsp;</strong></p> <p><strong>Introduction</strong></p> <p>We provide the InSAR and optical correlation displacement fields of the 1997 Mw 7.2 Zirkuh earthquake (NE Iran).<br> The InSAR data have been processed by Sudhaus and Jonsson (2011) and the optical correlation data by Marchandon et al. (2017).&nbsp;<br> We also provide the different fault slip models for the earthquake inferred from these data and published in Marchandon et al. (2017).&nbsp;<br> Finally, we include the source code of the genetic algorithm used in Marchandon et al. (2017) to infer the uniform slip models of the Zirkuh earthquake.<br> This genetic algorithm (Sudhaus and Jonsson, 2011) allows estimating the geometry and a uniform slip value for each segment of the fault. The Abiz fault, that broke during the Zirkuh earthquake,&nbsp;<br> is a complex structure with many fault strike variations that requires 16 segments to be properly modelled. Thus, a penalty function is implemented to constrain the algorithm to sample models<br> with limited dip angle fluctuations between neighboring segments (Sudhaus and Jonsson, 2011). The rupture is modelled as a dislocation embedded in an elastic half-space (Okada, 1992).&nbsp;</p> <p>For further information about the data, the method and the model results, see Marchandon et al. (2017).&nbsp;</p> <p><strong>Content</strong></p> <p>Data:&nbsp; &nbsp; &nbsp; InSAR data, optical Correlation data, weighting matrix files in .mat format, matlab script to plot the data.&nbsp;<br> Fault:&nbsp; &nbsp; &nbsp; Abiz fault segment&nbsp;locations file&nbsp;in .mat format and matlab script to plot the fault.<br> Scripts:&nbsp; &nbsp;All scripts needed to run the Non-linear optimization.<br> Models:&nbsp;&nbsp;Fault slip models for the Zirkuh earthquake and matlab script to plot them.&nbsp;</p> <p><strong>References</strong></p> <p>Sudhaus, H., and S. Jonsson (2011), Source model for the 1997 Zirkuh earthquake (Mw=7.2) in Iran derived from JERS and ERS InSAR observations, Geophysical Journal International,&nbsp;<br> 185(2), 676&ndash;692, doi:10.1111/j.1365-246X.2011.04973.x.</p> <p>Marchandon, M., Vergnolle M., Sudhaus, H., and Cavali&eacute;., O., (2017) Fault geometry and slip distribution at depth of the 1997 Mw 7.2 Zirkuh earthquake:&nbsp;<br> contribution of near-field displacement data, accepted with minor revisions at Journal of Geophysical Research: Solid Earth.&nbsp;</p> <p>Okada, Y. (1992), Internal deformation due to shear and tensite faults in a half-space, Bulletin of Seismological Society of America, pp. 1018&ndash;1040.</p> <p>&nbsp;</p>