Detailed Information on Publication Record
2023
Modelling the seismic response of the Mýtina maar volcanic structure
OPRŠAL, Ivo, Martin LABUTA and Jan BURJÁNEKBasic information
Original name
Modelling the seismic response of the Mýtina maar volcanic structure
Authors
OPRŠAL, Ivo (203 Czech Republic, guarantor, belonging to the institution), Martin LABUTA (203 Czech Republic) and Jan BURJÁNEK (203 Czech Republic)
Edition
Earth, Planets and Space, Berlin, Německo, Springer Nature, 2023, 1343-8832
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10500 1.5. Earth and related environmental sciences
Country of publisher
Germany
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
RIV identification code
RIV/75081431:_____/23:00002555
Organization unit
Institute of Technology and Business in České Budějovice
Keywords in English
3D numerical modelling; 3D resonance; Ambient vibrations; Array measurements; Dispersion curves; F–K analysis; Maar volcanic structure response; Site effects; Spectral analysis
Změněno: 2/6/2023 10:03, Barbora Kroupová
Abstract
V originále
In this study, we determine the properties of the maar volcanic structure using ambient vibration analysis. We performed several ambient vibrations surveys at Mýtina maar (West-Bohemia, Czechia) to map amplification by site-to-reference spectral ratios and to estimate average shear wave velocities by array methods. As the maar diatreme is formed by a deep concave body of broken rock, strong 3D resonances develop. The site-to-reference amplification factors reach a value of 20 in the central part of the maar. Using the noise data, we demonstrate possibility of mapping the lateral dimensions of the maar infills by ambient noise measurements. To understand these observations, we developed a simplified 3D viscoelastic velocity model and simulated synthetic ambient vibrations by the finite difference method. The simulated response fitted both, measured fundamental frequencies and the amplification levels. The maximum depth of the crater was estimated to be at least 800 m.