Moment tensor inversion of nine events in Iran using INSN data |
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| Authors: | Aref Bali Lashak Mehdi Zare Gholamreza Mortezanejad Shahrokh Pour Beyranvand |
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| Institution: | (1) International Institute of Earthquake Engineering and Seismology, Tehran, Iran;(2) Department of Earth Sciences, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran;(3) Institute of Geophysics, University of Tehran, Tehran, Iran; |
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| Abstract: | In this research, moment tensor (MT) inversion procedure in frequency domain is applied to nine events in order to evaluate
the data efficiencies in computing source parameters of earthquakes in Iran. The events are recorded by Iranian National Seismological
Network (INSN) stations, currently comprising 22 broadband stations. For the purpose of this study, first, the inversion procedure
is applied to obtain source parameters. Then, the results obtained here are compared with those of Harvard global centroid
moment tensors (GCMT) in order to estimate their reliabilities. The results show reasonable consistencies with those of Harvard
GCMT within 0.075 uncertainties in logarithmic scalar moment or 0.05 in moment magnitude and 20° in Kagan angle for focal
angles. Furthermore, according to the present research, the calculated source parameters are not significantly sensitive to
the azimuthal gap. |
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