Earthquake Source Parameters of Moderately Earthquake in the South Eastern Iran Based on Teleseismic and Regional Distances

Abstract eng:
Regional and teleseismic determination of body wave (S) spectra, interpreted in terms of the circular seismic source model, are used to estimate the parameters of March 13, 2005 earthquake that is occurred in south east of Iran. The results as follows: the seismic moment (Mo = 9.30 e +25 dyn-cm) , corner frequency (fo= 0.35hz), source dimension (R=3.9 km ) and stress drop (Δσ= 0.26 ×104 bar). Comparison between our results and Harvard CMT solution data show that it has some difference between common parameters. Especially the depth value reported by Harvard is 24 km greater than our result (CMT depth =56 km). Besides we can see some discrepancy between seismic moment parameters (Harvard data is Mo =1.17 e +25 dyn-cm). Scatter in the seismic moment values is caused by such factors as the site conditions and errors in the radiation pattern corrections.

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