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  Empirical shaking scenarios for Europe: a feasibility study

Bindi, D., Zaccarelli, R., Razafindrakoto, H., Yen, M.-H., Cotton, F. (2023): Empirical shaking scenarios for Europe: a feasibility study. - Geophysical Journal International, 232, 2, 990-1005.
https://doi.org/10.1093/gji/ggac382

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Bindi, Dino1, Autor              
Zaccarelli, Riccardo1, Autor              
Razafindrakoto, H.1, Autor              
Yen, Ming-Hsuan1, Autor              
Cotton, Fabrice1, Autor              
Affiliations:
12.6 Seismic Hazard and Risk Dynamics, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146032              

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Schlagwörter: Fourier analysis; Earthquake ground motions; Seismic attenuation; Site effects
 Zusammenfassung: We process a large number ofseismic recordings in Europe (i.e. about halfa million recordings from about 19 500 earthquakes) with the aim of decomposing the Fourier amplitude spectra into source, propagation and site effects. To account for first-order, large-scale regional differences in propagation effects, the spectral decomposition simultaneously solves six different models describing the spectral attenuation within different subregions. Since the decomposition approach is affected by trade-offs that make the solution non-unique, we assume a station installed on rock in Switzerland as reference station and we invert for relative site amplifications. To propagate the reference site condition to the entire data set, we develop a procedure based on a sequence ofdecompositions considering increasing and overlapping data sets. The applied procedure allows for a consistent evaluation of relative site effects for about 3200 station channels using a single reference station for the whole data set. Comparisons with site amplifications obtained in previous studies at common stations in Italy and Switzerland confirm the site amplification results. The target ofthis work is to show that the spectral models obtained for attenuation and site effects can be used to generate empirical shaking scenarios in the Fourier domain. Therefore, we conclude our feasibility study by presenting shaking maps generated at different frequencies for hypothetical magnitude 6.5 earthquakes with a Brune-type stress drop of 10 MPa located at different positions across Europe.

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Sprache(n): eng - Englisch
 Datum: 2022-09-302023
 Publikationsstatus: Final veröffentlicht
 Seiten: 16
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1093/gji/ggac382
GFZPOF: p4 T3 Restless Earth
OATYPE: Green Open Access
 Art des Abschluß: -

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Titel: Geophysical Journal International
Genre der Quelle: Zeitschrift, SCI, Scopus, ab 2024 OA-Gold
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 232 (2) Artikelnummer: - Start- / Endseite: 990 - 1005 Identifikator: ISSN: 0956-540X
ISSN: 1365-246X
CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals180
Publisher: Oxford University Press