بررسي گسل ها، توان لرزه زايي و خطر زمين لرزه در مخروط افكنه هاي شمال شرق درياچه اروميه

The Study of Faults, Earthquake Hazards and Shaking Power in Northeast Alluvial fans of Urmia Lake

Alluvial fans is one of piedmont landforms in arid and semiarid region. This features are sensitive to occurrence of earthquake as a geomorphic hazards. Study area is situated between 38° 09ʹ to 38° 15ʹ parallels and 45° 34ʹ to 45° 50ʹ meridians. The necessity of planning in alluvial fans areas, is clear with due regard to importance of settlements(13) and agriculture activities. For several reason, especially nearby to faults, soft layers, alluvial fans of this region exposed to earthquake hazards. Shaking activity was studied with historical and installation data. In attention to occurrence of several earthquakes in the past and probability happening the shaking power of area faults is calculated with different methods include Zareh, Ashjaei and Norozie. Results of research shows study area and around region faults has shaking power more than 6 Rishter and also shaking power is related to length of fault