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| Titel |
Measuring and crust-correcting finite-frequency travel time residuals – application to southwestern Scandinavia |
| VerfasserIn |
M. L. Kolstrup, V. Maupin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 6, no. 4 ; Nr. 6, no. 4 (2015-10-09), S.1117-1130 |
| Datensatznummer |
250115517
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| Publikation (Nr.) |
 copernicus.org/se-6-1117-2015.pdf |
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| Zusammenfassung |
| We present a data-processing routine to compute relative finite-frequency
travel time residuals using a combination of the Iterative Cross-Correlation
and Stack (ICCS) algorithm and the Multi-Channel Cross-Correlation method
(MCCC). The routine has been tailored for robust measurement of P- and S-wave
travel times in several frequency bands and for avoiding cycle-skipping
problems at the shortest periods. We also investigate the adequacy of ray
theory to calculate crustal corrections for finite-frequency regional
tomography in normal continental settings with non-thinned crust. We find
that ray theory is valid for both P and S waves at all relevant frequencies
as long as the crust does not contain low-velocity layers associated with
sediments at the surface. Reverberations in the sediments perturb the arrival
times of the S waves and the long-period P waves significantly, and need to
be accounted for in crustal corrections. The data-processing routine and
crustal corrections are illustrated using data from a~network in southwestern
Scandinavia. |
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