The khoramabad city is central Lorestan located between 48.15 – 48.30 and 33.15-33.30 above on the anticline Khoramabad tat cover with two faults in the north and south of it.This study is about structural geology and seismisity in the area. It shows that decolman displacement is the reason of the flooding in the high Zagros mountain belt. According of this study some of the faults indicator determined active faults and sinuosity of Khoramabad Mountain seem too. The oldest rocks is trace and garo formation what outcrop in Khorambad. Iran lies on a very active region from seismicity point of view, since a shallow destructive earthquake (M>6.8) and several moderate earthquake will be occur at least every ten years. The (ZMRF) and (HZF) and the other faults in the regional are active of quaternary right-lateral wrench faults almost direction are NW-SE strike.High zagros mountain fault and Khoraabad area is seismically active and following destructive earthquake have occurred along it. The Silakhor earthquake of 23 January 1909 (Ms=7.4), The Maximum magnitude recent earthquake is recorded in 1957 with MS=7.5 at last of this study show estimate risk hazard in Khoramabad and effective old tissue earthquake critical management.
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ESTIMATE RISK HAZARD IN KHORAMABAD AND EFEECTIVE OLD TISSUE EARTHQUAKE CRITICAL MANAGMENT 
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