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  Source parameters of recent moderate-size subcrustal earthquakes of Vrancea region (Romania)

Ardeleanu, L. A., Neagoe, C., Craiu, A., Craiu, M., Placinta, A. O. (2023): Source parameters of recent moderate-size subcrustal earthquakes of Vrancea region (Romania), XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0431

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Datensatz-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016020 Versions-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016020_2
Genre: Konferenzbeitrag

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 Urheber:
Ardeleanu, Luminita Angela1, Autor
Neagoe, Cristian1, Autor
Craiu, Andreea1, Autor
Craiu, Marius1, Autor
Placinta, Anca Otilia1, 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 seismic source parameters (seismic moment, corner frequency, source radius, static stress drop) of the moderate-size earthquakes which occurred in the Vrancea intermediate-depth seismogenic region (Romania) during the last decade are determined using the spectral analysis of S waves. The events have moment magnitudes between 4.5 and 5.7, and depths in the range from 90 to 150 km. The observed data are high-quality horizontal acceleration records. The source parameters are estimated from the displacement amplitude spectrum of the transverse component of motion. The duration of the time windows selected to compute the Fourier spectra is dependent on the earthquake magnitude and amplitude behaviour of the wave trains. The relations between the retrieved source parameters have also been examined. The trend of increasing fault radius with increasing seismic moment is visible, however the slope of the regression line is clearly smaller than the theoretical value predicted by the theory of self-similarity. The tendency of decreasing stress drop with decreasing seismic moment can also be noticed, which might indicate a deviation from the constant stress drop model.

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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/IUGG23-0431
 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

Entscheidung

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Quelle 1

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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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