Joint inversion of teleseismic P waveforms and surface-wave group velocities from ambient seismic noise in the Bohemian Massif

0371091 - GFÚ 2013 RIV CZ eng J - Journal Article
Růžek, Bohuslav - Plomerová, Jaroslava - Babuška, Vladislav
Joint inversion of teleseismic P waveforms and surface-wave group velocities from ambient seismic noise in the Bohemian Massif.
Studia geophysica et geodaetica. Roč. 56, č. 1 (2012), s. 107-140. ISSN 0039-3169. E-ISSN 1573-1626
R&D Projects: GA ČR GA205/07/1088; GA AV ČR IAA300120709; GA MŠMT LM2010008
Institutional research plan: CEZ:AV0Z30120515
Keywords : receiver function * seismic noise * joint inversion * Bohemian Massif * velocity structure
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 0.975, year: 2012

Joint inversion of teleseismic P-waveforms and local group velocities of surface waves retrieved from ambient seismic noise has been performed to model velocity structure of the crust and uppermost mantle of the Bohemian Massif. We analysed P-waveforms of 381 teleseismic earthquakes recorded at 54 broadband seismic stations located on the territory of the Czech Republic and in its close surroundings. Group velocities of Rayleigh and Love surface waves were obtained by cross-correlating long-term recordings of seismic noise. The basis for waveform inversion is the well-known methodology of P-to-S receiver functions constructed from converted phases. Due to instabilities in direct inversion of receiver functions caused by the necessity of applying deconvolution, we propose an alternative formulation to fit observed and calculated radial components of P waveforms. The joint inversion is transformed into a search for the minimum of the cost function defined as a weighted sum of waveform and group velocity misfits.
Permanent Link: http://hdl.handle.net/11104/0204717