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The unwanted amplification of monochromatic signals in seismic noise cross-correlation functions by spectral whitening

Groos, Jörn C.; Ritter, Joachim R.R.; Bussat, Sascha

Abstract:
The estimation of the Green’s function between two points on the Earth’s surface by the cross-correlation of seismic noise time series requires, in general, very long time series (months to years) as well as massive normalisation. Spectral whitening is a widely used powerful normalisation to improve the emergence of broad-band signals in seismic noise cross-correlations. Nevertheless, we observe spectral whitening to depend strongly on the time window length necessarily used to fragment very long time series. An unwanted amplification of a persistent microseism signal is observed on the continental scale with time windows shorter than 12 hours.

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Volltext §
DOI: 10.5445/IR/1000038619
Seitenaufrufe: 32
seit 27.04.2018
Downloads: 693
seit 25.02.2014
Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
Publikationstyp Proceedingsbeitrag
Jahr 2012
Sprache Englisch
Identifikator ISSN: 0947-1944
urn:nbn:de:swb:90-386199
KITopen-ID: 1000038619
Erschienen in Noise and diffuse wavefields. Extended abstracts of the 2nd Neustadt Workshop, Neustadt an der Weinstraße, Germany, 11 - 14 November 2012. Ed.: A. Schmidt
Verlag DGG, Potsdam
Seiten 42-43
Serie Mitteilungen / Deutsche Geophysikalische Gesellschaft: Sonderband ; 2012,4
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