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Determination of the seismic structure of the Earth’s mantle based on joint analysis of gravimetric and seismometric data

Urheber*innen

Wilde-Piorko,  Monika
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Karkowska,  Kamila
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Dykowski,  Przemyslaw
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Sękowski,  Marcin
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Polkowski,  Marcin
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Zitation

Wilde-Piorko, M., Karkowska, K., Dykowski, P., Sękowski, M., Polkowski, M. (2023): Determination of the seismic structure of the Earth’s mantle based on joint analysis of gravimetric and seismometric data, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3564


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020594
Zusammenfassung
This study presents a new concept of joint analysis of the gravimetric and seismometric recordings of earthquakes for determining the seismic structure of the Earth’s mantle. The proposed method allows using gravimetric data without the known full transfer function of the instrument. Group and phase velocity dispersion curves of the fundamental mode of Rayleigh waves are measured from recordings of superconducting gravimeter and broad-band seismometers operating at the same location, allowing for exploration of a broader response for incoming seismic waves. The analysed sites, the Yebes, Larzac, Wettzell, Pecny and Borowa Góra Observatories, are located along the profile going from central Spain to central Poland and crossing the main tectonic unite of Europe – the Trans-European Suture Zone. Calculated dispersion curves are inverted by the weighted linear inversion and Monte Carlo methods to estimate a distribution of shear-wave seismic velocity in the Earth’s mantle. A comparison of the deterministic and probabilistic inversion methods can excellently demonstrate surface waves’ ability to determine the Earth’s mantle structure.This work was done within the research project No. 2017/27/B/ST10/01600 financed from the Polish National Science Centre funds.