Seismic waves velocities inferred from the surface waves dispersion in the Malé Karpaty Mountains, Slovakia

0517296 - ÚSMH 2020 RIV CZ eng J - Journal Article
Lukešová, Renata - Fojtíková, Lucia - Málek, Jiří - Kolínský, P.
Seismic waves velocities inferred from the surface waves dispersion in the Malé Karpaty Mountains, Slovakia.
Acta geodynamica et geomaterialia. Roč. 16, č. 4 (2019), s. 451-464. ISSN 1214-9705. E-ISSN 2336-4351.
[Czech - Polish - Slovak Symposium on Mining and Environmental Geophysics /37/ and Conference OVA´19 - New Knowledge and Measurements in Seismology, Engineering Geophysics and Geotechnical Engineering /28/. Rožnov pod Radhoštěm, 28.05.2019-31.05.2019]
Institutional support: RVO:67985891
Keywords : Surface waves * Joint inversion of Love and Rayleigh waves * 1-D velocity model * Malé Karpaty
OECD category: Geology
Impact factor: 1.227, year: 2019
Method of publishing: Open access
https://www.irsm.cas.cz/materialy/acta_content/2019_doi/Lukesova_AGG_2019_0038.pdf

The study area of Western Carpathians belongs to one of the most seismically active regions in Slovakia, where the available velocity models are not precise enough for accurate location and
determination of focal mechanism. To improve the uppermost part of the currently used models, seismic surface wave data from two blasts in the quarry Rohožník, recorded at the MKnet local
seismic network, were analyzed. Group velocity dispersion curves of Rayleigh and Love waves were determined by the frequency-time analysis. A mean group velocity dispersion curve for
Love and Rayleigh waves for the central part of the MKnet network was settled and consequently joint inversion, for the period range 0.9 – 2.7 s, was performed to obtain a 1-D
velocity model using the isometric method. The 11-layered model extends to depth of 2.5 km and indicate increase of the velocities from the surface down to the depths of 0.9 km. Then,
velocities slightly decrease. The minimum of the low-velocity zone is at the depth of 1.8 km s.after which the velocities moderately increase to the velocity of the halfspace with vP = 5.35 km/s
and vS = 2.96 km/s.
Permanent Link: http://hdl.handle.net/11104/0302612