Tehran as the capital of Iran is located in a high seismic zone. The seismic study of the region shows that it is prone to moderate as well as large earthquakes. Occurrence of large destructive earthquakes in Tehran region and inadequate instrumental data makes the important of occurrence of large earthquakes in this region for seismologist. Simulation of strong ground motion based on a hybrid method of Ricker wavelet and envelope waveform has been used to estimate the ground motion due to a hypothetical earthquake in this region. The simulated records show high peak ground acceleration in Tehran region, which can cause widespread damage to Tehran city. The return period for high PGA closed to 1g may be around 2475 years.
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