Probabilistic zoning of Mercali severity using Ez-Frisk software: a case study of Mako area, northwest of Iran.

The aim of this study is to present the modified Mercalli intensity map in a probabilistic way based on seismic studies in Mako Quadrangle. The studied area is located in the northwest corner of Iran. The occurrence of several destructive earthquakes and the presence of active faults indicate a high level of seismicity in this region. Based on tectonic earthquake surveys and b parameter values, all active seismic springs were identified and seismic parameters were calculated for them. Then the modified Mercalli intensity map was calculated using four reduction relations. The results showed that the maximum intensity is in the form of a strip with a northwest-southeast trend, which shows a good compatibility with the Igdeer and Blikglu faults. The present results are in good agreement with the intensity map of the earthquakes that occurred in the region.