Parameters of the M w 5 . 8 Fin ( South of Iran ) Earthquake of March 25 , 2006

Teleseismic body waveform modeling of the far-field P-and SH-waveforms and spectral analysis of P-waves are used to determine the source parameters of the March 25, 2006 Fin earthquake (mb 5.7). Its epicenter is located at the South of Iran in Hormozgan Province. The waveform modeling results show the earthquake was caused by a thrust motion on a NW-SE striking fault with parameters: Fault plane (strike=308, dip = 30 and the rake of 95) and auxiliary plane (strike = 113, dip = 60, rake = 100), depth of 17 km and Mo of 6.728E17 N.m. The spectral analysis of the far-field P-wave pulses resulted in a fault length L ~17 km, stress drop ∆σ~2.88 bars and average displacement u ~ 9.5 cm. In this study, the variant models to determine the source dimension were examined and found that the Madariaga model is more reliable than the other models and consequently, usable to estimate the source parameters.