محید نعمتی - دانشجوی کارشناسی ارشد ژئوفیزیک (زلزله شناسی موسسه ژئوفیزیک دانشگاه ت
محمدرضا قیطانچی - دانشیار شاغل در موسسه ژئوفیزیک دانشگاه تهران
مرتضی طالبان - استادیار شاغل در سازمان زمین شناسی و اکتشافات معدنی کشور

The Feb. ٢٣،٢٠٠٥ earthquake of Mw ٦,٤ shook west of Zarand in the southeast of Iran .This earthquake killed ٦١٢ persons and destroyed ٦٠ around villages . Field investigation and aftershocks distribution suggest a W-E faulting with northward dip,١١٠(cm)vertical dislocation , ٢٠‐٤٠(cm) right lateral strike-slip motion , ٨(km) surface and about ٨(Km) blind rupture. Enormous aftershocks were recorded by ٥ Stations of Geophysics Institute temporary network and about ٤٠٠ common aftershocks between them with ٤,٤ for strongest one which was separated is processed with other data's, like global and national telemetry network data's and GSI field investigation.