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  Urban Noise Tomography in Athens, Greece, using Distributed Acoustic Sensing (DAS)

Bowden, D., Tian, L., Wang, Y., Smolinski, K., Fichtner, A., Bogris, A., Nikas, T., Lentas, K., Melis, N. S., Simos, C., Simos, I. (2023): Urban Noise Tomography in Athens, Greece, using Distributed Acoustic Sensing (DAS), XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3439

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Datensatz-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019491 Versions-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019491_1
Genre: Konferenzbeitrag

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 Urheber:
Bowden, Daniel1, Autor
Tian, Lu1, Autor
Wang, Yuhan1, Autor
Smolinski, Krystyna1, Autor
Fichtner, Andreas1, Autor
Bogris, Adonis1, Autor
Nikas, Thomas1, Autor
Lentas, Konstantinos1, Autor
Melis, Nikolaos S.1, Autor
Simos, Christos1, Autor
Simos, Iraklis1, Autor
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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Schlagwörter: -
 Zusammenfassung: We use 24 km of telecommunications fiber in Athens, Greece, to explore the use of ambient noise correlations and the construction of a shallow 2D velocity model. Models of the shallow subsurface are especially important for hazard and site-response characterisation, yet traditional measurement campaigns in dense, urban environments can be challenging. Using pre-existing telecommunications fiber provides an efficient and easy way to construct such high-resolution models.The fiber was provided by the Hellenic Telecommunications Organization (OTE), over 36 days in the Autumn of 2021, and in cooperation with the National Observatory of Athens (NOA). Using a Silixa iDAS interrogator, we measure strain-rates every 4 meters along the fiber to provide dense observations of wave propagation. Strong anthropogenic noise gives clear Rayleigh-wave signals in cross-correlations in the frequency band of 5-30 Hz. We discuss our efforts to efficiently stack multiple virtual sources’ record sections and construct dispersion curves. We then invert for numerous 1D velocity profiles of the top ~100 m, comparing different approaches, and finally present a 2D model over the entire line.

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Sprache(n): eng - Englisch
 Datum: 2023
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.57757/IUGG23-3439
 Art des Abschluß: -

Veranstaltung

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Veranstaltungsort: Berlin
Start-/Enddatum: 2023-07-11 - 2023-07-20

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Genre der Quelle: Konferenzband
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Potsdam : GFZ German Research Centre for Geosciences
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