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  • 11
    Electronic Resource
    Electronic Resource
    Springer
    Studia geophysica et geodaetica 16 (1972), S. 413-414 
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Springer
    Studia geophysica et geodaetica 33 (1989), S. 133-145 
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary A two-sided recursive inverse filtering procedure, originally proposed by R. Vích, is used to restore the true ground motion from digital records of inertial electromagnetic seismographs. Numerical simulations of far-field and near-field P-wave seismograms are used to test the performance of the procedure and to derive criteria for recognizing successful restorations. The procedure is applied to seismograms of local microearthquakes as well as of teleseismic events, and the restored signals are compared with those obtained by causal (one-sided) inverse filtering. In all cases the two-sided approach proved to have fundamental advantages: a higher accuracy of the approximation of the true ground motion, a faster convergence to the best attainable approximation, a lower sensitivity to incoherent noise, and a more reliable discrimination between veracious and dubious results.
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Studia geophysica et geodaetica 35 (1991), S. 184-195 
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The phase velocity dispersion of Rayleigh waves for the Moxa-Vienna (MOX-VIE) and Moxa-Kašperské Hory (MOX-KHC) profiles, and of both Rayleigh and Love waves for the Kašperské Hory-Ksiąź (KHC-KSP) profile have been measured and inverted into models of shearwave velocity vs. depth. The three paths cross, respectively, the central part of the Bohemian Massif, its western margin, and the Bohemian Pluton and Cretaceous. For the MOX-VIE profile mean and lower crustal shear wave velocities of 3.7 and 3.9 km/s, respectively, a mean Moho depth of 34 km, and no existence of a low-velocity layer in the lower crust were found. The model obtained for the MOX-KHC profile is characterized by a slightly lower velocity in the lower crust (3.8 km/s), by a slightly lower Moho depth (32 km), and by the appearance of a weak low-velocity channel between 55 and 140 km. The crustal section of the final model for the KHC-KSP profile agrees well with the KHKS82 model derived by Novotný from results of DSS along international profile VII. Our final Rayleigh-wave model has significantly lower shear-wave velocities down to 215 km in the mantle. A systematic difference of 0.18 km/s between the average velocities of Rayleigh and Love waves has been revealed for the depth range from 30 to 215 km. Since almost no contamination of the fundamental Love mode with higher modes has been observed, and since the investigated structure hardly contains an unresolved system of thin, alternately low- and high-velocity layers, the cause of the difference is evidently polarization anisotropy of the upper mantle beneath the Bohemian Massif. It is recommended that the discussed investigations should be supplemented with data from the fan of KSP-GRF (Gräfenberg Array, Germany) paths and from the KHC-BRG (Berggiesshübel, Germany) profile.
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  • 14
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Description / Table of Contents: Summary Phase velocities of Rayleigh and Love waves have been measured between the broadband seismic stations KHC (Kašperské Hory, South Bohemia) and KSP (Książ, Lower Silesia), a profile that nearly coincides with the Interactional DSS Profile VII. The data for both wave types were separately inverted into models of shear-wave velocity versus depth. Novotný's model KHKS 82[1] for the DSS Profile VII was used as a start model. While the crustal section of Novotný's model is compatible with both of our data sets, our Rayleigh-wave data require smaller shear-wave velocities, on the average by 0.24 km/s, in the top 180 km of the mantle. The average difference between Novotný's model and our Love-wave model in that depth range is only 0.06 km/s. If our identification of the observed Love waves as the fundamental mode is correct, this result indicates the presence of polarization anisotropy in the uppermost mantle.
    Notes: Резюме Былы uзмерены фaзовые скоросmu волн Релея u Лявa меж¶rt;у шuрокоnолоснымu сеŭсмuческuмu сmaнцuямu КНС (Кaшnерске Горы, Южнaя Чехuя) u КSР (Кшонгж, Нuжнaя Сuлезuя). Профuл КНС - КSР nрuблuзumельно сооmвеmсmвуеm меж¶rt;унaро¶rt;ному nрофuлью VII ГСЗ. Дaнные ¶rt;ля обоuх munов волн былы оm¶rt;ельно uнверmuровaны в мо¶rt;елu зaвuсuмосmu скоросmu nоnеречных волн оmглубuны. В кaчесmве сmaрmмо¶rt;елu былa uсnользовaнa мо¶rt;ель КНКS 82 Новоmного[1] ¶rt;ля nрофuля VII ГСЗ. Коровaя чaсmь мо¶rt;елu Новоmного срaвнuмa с обеuмu нaборaмu нaшuх ¶rt;aнных, о¶rt;нaко нaшu ¶rt;aнные ¶rt;ля волн Релея mребуюm более нuзкuх скоросmеŭ nоnеречных волн — в сре¶rt;нем нa 0,24 км/с в верных 180 кuломеmрaх мaнmuu. Сре¶rt;нaя рaзнuцa меж¶rt;у мо¶rt;елью Новоmного u нaшеŭ мо¶rt;елью ¶rt;ля волн Лявa в эmом ¶rt;uanaзонеглубuн не nре¶rt;сmaвляеm больше 0,06 км/с. Еслu нaшa u¶rt;енmuфuкaцuя нaблю¶rt;aемых волн Лявa кaк фун¶rt;aменmaльного мо¶rt;a являеmся nрaвuльноŭ, mо эmоm резульmam свu¶rt;umельсmвуеm о nрuсуmсвuu nолярuзaцuонноŭ aнuзоmроnuu в верхнеŭ мaнmuu.
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  • 15
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    In:  Phys. Earth Plan. Interiors, San Francisco, Pergamon, vol. 62, no. 3, pp. 298-306, pp. 1121, (ISSN: 1340-4202)
    Publication Date: 1990
    Keywords: Anisotropy ; Broad-band ; Seismology ; EUROPROBE (Geol. and Geophys. in eastern Europe) ; PEPI ; Horalek
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  • 16
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    In:  J. Geophys., Stockholm, Wissenschaftliche Buchgesellschaft, vol. 59, no. 1-2, pp. 129-139, pp. L11308, (ISSN: 1340-4202)
    Publication Date: 1986
    Keywords: Polarization
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  • 17
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    In:  Phys. Earth Plan. Interiors, Kunming, China, D. Reidel Publishing Company, vol. 51, no. 2-4, pp. 155-156, pp. L09303, (ISSN: 1340-4202)
    Publication Date: 1988
    Keywords: CRUST ; Surface waves ; Rayleigh waves ; Love-waves ; Velocity analysis ; Plesinger ; PEPI ; Horalek
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  • 18
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    In:  J. Geophys., Stockholm, Wissenschaftliche Buchgesellschaft, vol. 40, no. 1-2, pp. 131-136, pp. L11308, (ISSN: 1340-4202)
    Publication Date: 1974
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  • 19
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    In:  Bulletin of the Seismological Society of America, Taipei, 3-4, vol. 95, no. 5, pp. 1928-1939, pp. 2548, (ISSN: 1340-4202)
    Publication Date: 2005
    Keywords: Seismology ; Nearfield ; Broad-band ; Low frequency ... ; Greece ; Corinth ; Earthquake engineering, engineering seismology ; BSSA ; Zahradnik
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  • 20
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    In:  Geophys. J. Int., Houston, Akademie-Verlag, vol. 105, no. 1-2, pp. 801-804, pp. L08310, (ISSN: 1340-4202)
    Publication Date: 1991
    Keywords: Seismology ; ConvolutionR ; Earth model, also for more shallow analyses ! ; Broad-band ; Body waves ; earth mantle ; Plesinger ; Horalek ; GJI
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