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Jackknifed multiple-window spectra and coherence applied to seismic data

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1 Author(s)
Vernon, F.L. ; Inst. of Geophys. & Planetary Phys., California Univ., San Diego, La Jolla, CA, USA

Examines the variance of power spectra and magnitude squared coherences determined from local earthquake seismograms recorded synchronously on a small aperture seismic array. The multiple taper algorithm is used to calculate the spectra and coherences. Variances of these estimates are calculated with the jackknife technique, after transforming to a more normal distribution, and are compared with expected theoretical values. Due to the normalizing process the jackknife 95% confidence limits for the coherences and the spectra are slightly biased compared to theoretical values. The distribution of the jackknife error estimates has a large variance which is most likely caused by the non-stationarity of the original time series

Published in:

Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on  (Volume:vi )

Date of Conference:

19-22 Apr 1994