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      https://www.ias.ac.in/article/fulltext/jess/112/04/0569-0576

    • Keywords

       

      Q c ; coda waves; single backscattering model; digital telemetered seismic network; Kumaun Himalaya

    • Abstract

       

      CodaQ (Qc) estimates for the Kumaun Himalaya region have been obtained in high frequency range. Local earthquakes, recorded by a digital seismic network in the region, which fall in the epicentral distances range of 10 to 80 km and with a local magnitude range of 1.4 to 2.8, have been used. The coda waves of 30 sec window length, filtered at seven frequency bands centered at 1.5, 3, 6, 9, 12, 18 and 24Hz, have been analysed using the single backscattering model. The values ofQc estimates vary from 65 to 283 at 1.5 Hz to 2119 to 3279 at 24.0 Hz which showed thatQc is frequency dependent and its value increases as frequency increases.

      A frequency-dependentQc relationship,Qc = (92 ± 4.73)f(1.07±.023), is obtained for the region representing the average attenuation characteristics of seismic waves for Kumaun Himalaya region.

    • Author Affiliations

       

      A Paul1 S C Gupta2 Charu C Pant1

      1. Department of Geology, Kumaun University, Nainital - 263 002, India
      2. Department of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee - 247 667, India
    • Dates

       
  • Journal of Earth System Science | News

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