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Information Journal Paper

Title

Estimation of shear wave quality factor (Qs) of seismic data of Firoozabad-Kojour earthquake

Pages

  339-349

Abstract

 The Attenuation of seismic waves with respect to distance is one of the most important parameters in seismological and earthquake engineering studies. The purpose of this study is to estimate quality factor of Shear Waves (QS) of seismic data of the earthquake occurred in the Central Alborz at 34º to 37º north latitude and 50º to 56º east longitude, using the spectral drop. For this purpose, the data from earthquake of May 28, 2004 Firouzabad-Kojur and its aftershocks, recorded by seismic networks of Sari and Semnan, affiliated with the Institute of Geophysics of Tehran University have been used; and the quality factor of direct S wave (QS) at the seven central frequencies of 1. 5, 3. 0, 4. 5, 6. 0, 9. 0, 12. 0 and 18. 0 Hz has been estimated. The estimated frequency-dependent relationship of QS on N-S and E-W components are QS=76. 61f 0. 8 and QS=70. 35f 0. 85, respectively. The mean values of QS for the two components indicate a relation with frequency that is QS=73. 54f 0. 83. The results show an increase in QS with increasing frequency, and Q0 value for this area corresponds with the seismotectonic study of the region. ...

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    APA: Copy

    Riyahi Kojor, Vahid, & AFSARI, NARGES. (2019). Estimation of shear wave quality factor (Qs) of seismic data of Firoozabad-Kojour earthquake. JOURNAL OF RESEARCH ON APPLIED GEOPHYSICS, 4(2 ), 339-349. SID. https://sid.ir/paper/268569/en

    Vancouver: Copy

    Riyahi Kojor Vahid, AFSARI NARGES. Estimation of shear wave quality factor (Qs) of seismic data of Firoozabad-Kojour earthquake. JOURNAL OF RESEARCH ON APPLIED GEOPHYSICS[Internet]. 2019;4(2 ):339-349. Available from: https://sid.ir/paper/268569/en

    IEEE: Copy

    Vahid Riyahi Kojor, and NARGES AFSARI, “Estimation of shear wave quality factor (Qs) of seismic data of Firoozabad-Kojour earthquake,” JOURNAL OF RESEARCH ON APPLIED GEOPHYSICS, vol. 4, no. 2 , pp. 339–349, 2019, [Online]. Available: https://sid.ir/paper/268569/en

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