A comparison of measured and calculated elastic anisotropies of marble     

Karel Klíma  Vladislav Babuška 《Studia Geophysica et Geodaetica》1968,12(4):377-384

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Dispersion and amplitudes of love waves for some models of the earth's crust and mantle     

Karel Pěč  Oldřich Novotný  Reviewer J. Vaněk 《Studia Geophysica et Geodaetica》1976,20(1):10-38

Summary The properties of the partial derivatives of dispersion curves, amplitudes and theoretical seismograms, in particular the occurrence of short-period phases, are studied on four crustmantle models. The individual models differ in the number of low-velocity channels. The fundamental and first higher mode of Love waves are studied in detail.  相似文献   

Long period variations of the geomagnetic field and their spatial distribution in Europe     

Jana Pěčová  Oldřich Praus  Karel Pěč  Reviewer A Janáčková 《Studia Geophysica et Geodaetica》1977,21(2):148-158

a 27 nu amu ama m¶rt;au nma aaua ¶rt; nu nma anum¶rt; 27-¶rt; auauu u ÿeau nu¶rt;au 13–14 u 9 ¶rt;. mam an¶rt;u nma anum¶rt; Z u H mau a n nuuuu auauuu uuP ₁ (cos ) u P ₁ /, mmm. mau mau a um auumu mau auau ¶rt; mmu mu Z/H ¶rt; a¶rt; amuu. au ¶rt; mmuuu u umu a¶rt;au muu ¶rt; ¶rt;am uau mu ¶rt;¶rt;mmu mu u. a aaua au mu Z/H ¶rt;m u uam n u m aa amu.  相似文献   

Anomalous induction in the Carpathians     

Jerzy Jankowski  Antoni Szymański  Karel Pěč  Václav Červ  Václav Petr  Jana Pěčová  Oldřich Praus  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1977,21(1):35-57

nuam mam uu auauaum n aumua ¶rt; a 9 n mau ¶rt; nu No V, na anam. ma uam a aa u¶rt;uu aau ¶rt; uu u mau anamau. m m u¶rt;uu u aauuaa amma aamumua aa ma. ¶rt;a a m¶rt; mau ¶rt; aumua u mm a¶rt;u n a m u mau. uamua aau ¶rt;m u mu ma, m m ¶rt;u u umu m n. maum aamumuu n nma mmuuu aauu aumau ¶rt; m ¶rt;- ¶rt;¶rt;muu mm ¶rt; nu u m¶rt; am.

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A substantial part of this paper was presented at the IAGA symposium Relations between External and Internal Magnetic Variations, XVI. IUGG General Assembly, August–September 1975, Grenoble.  相似文献   

Seismic refraction problem in anisotropic media of the cretaceous plateau in czechoslovakia     

Karel Cidlinský  Reviewer I. Pšenčík 《Studia Geophysica et Geodaetica》1980,24(1):98-101

Summary Media with a distinct anisotropy make application of the refraction method for seismic exploration rather complicated. Velocity data obtained by seismic shooting, sonic log and laboratory measurements of borehole cores have been studied in the region of the Bohemian Cretaceous and interpretation problems of refraction have been analysed. Experience has shown that in such complicated anisotropic media the reflection method in the CDP modification has proved to be much more suitable.Paper was presented at the workshop meeting Seismic Waves in Laterally Inhomogeneous Media, Liblice 1978.  相似文献   

Ulf-wave diagnostics of a mid geomagnetic latitude model of the ionosphere     

Karel Prikner  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1980,24(2):173-190

Summary Wave diagnostics of several alternatives of a constructed model of the daytime and night ionosphere of the mid geomagnetic latitudes were carried out in the ULF range of electromagnetic waves. The altitude profiles of local wave parameters of the ionosphere, the wavelengths and wave attenuation, were analysed at a fixed frequency. The frequency dependence of the amplitude and polarization characteristics of the total wave at the Earth's surface were also analysed in dependence on the frequency-amplitude spectrum of geomagnetic pulsations. The effect of the low regions of the ionosphere (h<100 km) was tested on the damping of the propagating wave and on the frequency-amplitude and polarization characteristics of the wave at the Earth's surface.  相似文献   

Frequency band of mirroring and bands of increased transmissivity of ULF waves through the ionosphere     

Karel Prikner  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1982,26(1):96-101

Summary Using methods of numerical modelling of the propagation of ULF waves through the ionosphere, the characteristics of the vertical flux of electromagnetic energy are analysed in the ULF range — at the outer boundary of the modelled ionosphere (altitude 1000 km) the reflexibility and penetrability of the energy, at the Earth's surface the transmissivity of the energy. The existence of two frequency bands is proved within the ULF range with different forms of ionospheric wave filtration: a) The band of extremely low frequencies, f<0.1–0.2 Hz (pc3–5 and Pc2 pulsation ranges) with a mirroring effect of the ionosphere-Earth system, but with small absorption; b) the band f>0.2 Hz (the Pc1 range) with increased absorption, but with resonance windows and wave emissions with a very well defined frequency structure.  相似文献   

Characteristics of the ionospheric correction in ULF wave diagnostics of the magnetosphere     

Karel Prikner  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1982,26(2):201-207

Summary Amplitude and energy correction character istics of the vertical propagation of ULF wave from the magnetosphere through the ionosphere to the Earth's surface, necessary for micropulsation wave diagnostics of the magnetosphere by means of ground-based observations, are introduced on the basis of matrices ofR–T coefficients [1–3]. The coefficients of vertical reflexibility, penetrability, transmissibility (or limpidity) and the absorption of the electromagnetic energy flux are defined, as well as analogous coefficients in the dimensions of the magnetic amplitude of the ULF wave, propagating through the given layer of the ionosphere. An examplary model of the ionosphere is used to demonstrate the frequency variations of these characteristics in the ULF wave range.  相似文献   

Matrix approach to the solution of electromagnetic induction in a spherically layered earth     

Karel Pěč  Zdeněk Martinec  Jana Pěčová  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1985,29(2):139-162

Summary Matrix formulae for the intensities of the M- and E-fields have been derived. They have been applied to express the apparent resistivity, the transfer function, as well as the frequency equation determining the frequencies of free motion of the M- and E-waves. A fast algorithm for computing the transfer function and the apparent resistivity has been suggested.

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Numerical calculation of frequency-time displays using amplitude-time records     

Karel Dobes  Jaroslav Střeštík  Karel Prikner  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1971,15(3-4):331-339

Zusammenfassung Den Gegenstand der Arbeit bildet die numerische Auswertung der Amplitudenaufnahmen geomagnetischer und tellurischer Pulsationen in Form von Frequenz-Zeitentwicklungen unter Anwendung einer Rechenmaschine. Das Wesen der Methode beruht auf der Berechnung des Laufspektrums der Pulsation mit bestimmtem Zeitschritt und entsprechender Gewichtsfunktion, durch die man verschiedene Arbeitsregime modellieren kann. Es wurde die Optimalkombination von wählbaren Parametern festgesetzt und in dieser Anordnung wurden dann die Frequenz-Zeitentwicklungen verschiedener Pulsationstype berechnet. Die Ergebnisse ergänzen in geeigneter Weise die aus dem Studium der Pulsationsspektren gewonnenen Informationen.  相似文献