Abstract

BIRCH, D.J.; CICHOWICZ, A.  and  GROBBELAAR, D.. Q-coda estimation in the Kaapvaal Craton. J. S. Afr. Inst. Min. Metall. [online]. 2015, vol.115, n.6, pp.541-548. ISSN 2411-9717.

The Q-coda method for estimating the quality factor Q(f)= Qo(f)ⁿ was used to characterize seismic wave attenuation in a region of the Kaapvaal Craton that includes the mining areas of the Bushveld Complex and Witwatersrand Basin. Seismic waveform data, collected by locally distant stations of the South African National Seismograph Network (SANSN), consisted of mining-related events with magnitudes ranging from M_L 1.8 to M_L 4. Q was calculated for nine different source-receiver pairs spanning the study region. A weighted average Q based on the number of available data gave an estimated attenuation relation for the study region of Q(f) = 327f^0.81.

Keywords : seismic wave attenuation; coda waves; Q-coda method.

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