Jackknifed multiple-window spectra and coherence applied to seismic data

Author

Vernon, Frank L.

Author_Institution

Inst. of Geophys. & Planetary Phys., California Univ., San Diego, La Jolla, CA, USA

fYear

1994

fDate

19-22 Apr 1994

Abstract

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

Keywords

array signal processing; coherence; geophysical signal processing; normal distribution; seismology; spectral analysis; time series; confidence limits; earthquake seismograms; jackknife error estimates; jackknife technique; jackknifed multiple-window spectra; magnitude squared coherence; multiple taper algorithm; normal distribution; normalizing process; power spectra coherence; seismic data; small aperture seismic array; time series; Apertures; Bandwidth; Convolution; Earthquakes; Eigenvalues and eigenfunctions; Frequency; Seismic measurements; Signal generators; Spatial resolution; Stress;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on

Conference_Location

Adelaide, SA

ISSN

1520-6149

Print_ISBN

0-7803-1775-0

Type

conf

DOI

10.1109/ICASSP.1994.389895

Filename

389895