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URN: urn:nbn:de:swb:90-386199

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.


Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
Publikationstyp Proceedingsbeitrag
Jahr 2012
Sprache Englisch
Identifikator ISSN: 0947-1944
URN: 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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