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  Regional variation of attenuation characteristics using body wave in the crust of Garhwal-Kumaun Himalaya region, India

Biswas, R., Mandal, P., Saha, S., Prathigadapa, R., Shekar, m., Raghavan, R. V. (2023): Regional variation of attenuation characteristics using body wave in the crust of Garhwal-Kumaun Himalaya region, India, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4851

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Datensatz-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021255 Versions-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021255_1
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 Urheber:
Biswas, Rahul1, Autor
Mandal, Prantik1, Autor
Saha, Satish1, Autor
Prathigadapa, Raju1, Autor
Shekar, m1, Autor
Raghavan, R. Vijaya1, Autor
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Zusammenfassung: The attenuation characteristics in the crust of Garhwal-Kumaun Himalaya region have been estimated using 465 well located earthquakes which were recorded at 52 three-component broadband stations during 2017-2020. We have used extended coda normalization method to estimate the body wave attenuation (Qp and Qs) for five different central frequencies (1.5, 3, 6, 12, and 18 Hz) at each station. The results show strong frequency dependent body wave attenuation in the crust of the study region. To explore the lateral variations of attenuation properties, we have made separate estimation for Garhwal and Kumaun region and obtained the frequency dependent relations as follows: Qp = (30 ± 3).f^(1.05±0.05) , Qs = (143 ± 20).f^(0.88±0.07) for Garhwal region and Qp = (31 ± 1).f^(1.09±0.02) , Qs = (121 ± 11).f^(1.00±0.04) for Kuamun region. Both the regions show strong frequency dependent nature of Q, which may suggest the existence of heterogenities and tectonic complexities in these two regions. The obtained ratios of Qs/Qp are high (> 1) for the entire analyzed frequency range which are likely to be associated with high degree of heterogenity in the study region. Also, obtained results are well comparable with other reported studies of Qp and Qs for Himalayan as well as different tectonic regions in the world.

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Sprache(n): eng - Englisch
 Datum: 2023-07-112023-07-11
 Publikationsstatus: Final veröffentlicht
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
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 Identifikatoren: DOI: 10.57757/IUGG23-4851
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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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