caa a22 4500 465723926 CHVBK 20180323111724.0 cr unu---uuuuu 170327e19900701xx s 000 0 eng 10.1007/BF02295925 doi (NATIONALLICENCE)springer-10.1007/BF02295925 Approximate absorption corrections for complete SH seismograms [Elektronische Daten] [Jiří Zahradník, Jiří Jech, Peter Moczo] Summary: An approximate absorption correction is proposed that can be applied retroactively to the response of a perfectly elastic medium, not decomposed into elementary waves, for example in the finite-difference method. As the duration of excitation decreases, the approximate correction approaches the exact, and becomes quite exact for impulsive excitation. The correction makes use of the perfectly elastic response and dissipation operator, but their relation is not simply convolutory. The method is restricted to a spatially constant Q with an arbitrary power-law frequency dependence. The advantage of the approximate solutions, as compared to the exact, in which the absorption is included in the equation of motion, is in a considerable saving of computer time if several absorption models (or several Q values) are repeatedly applied to the same structure. The simplest computations are for Q linearly dependent of the frequency, where the absorption correction reduces to an exponential time windowing. Academia, Publishing House of the Czechoslovak Academy of Sciences, 1990 Zahradník Jiří Institute of Geophysics, Charles University, V Holešovičkách 2, 180 00, Praha 8, Czechoslovakia aut Jech Jiří Geophysical Institute, Czechoslovak Academy of Sciences, Boční II, 141 31, Praha 4, Czechoslovakia aut Moczo Peter Geophysical Institute, Slovak Academy of Sciences, Dúbravská cesta, 842 28, Bratislava, Czechoslovakia aut Studia Geophysica et Geodaetica Kluwer Academic Publishers 34/3(1990-07-01), 185-196 0039-3169 34:3<185 1990 34 11200 https://doi.org/10.1007/BF02295925 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02295925 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zahradník Jiří Institute of Geophysics, Charles University, V Holešovičkách 2, 180 00, Praha 8, Czechoslovakia aut NATIONALLICENCE 700 1- Jech Jiří Geophysical Institute, Czechoslovak Academy of Sciences, Boční II, 141 31, Praha 4, Czechoslovakia aut NATIONALLICENCE 700 1- Moczo Peter Geophysical Institute, Slovak Academy of Sciences, Dúbravská cesta, 842 28, Bratislava, Czechoslovakia aut NATIONALLICENCE 773 0- Studia Geophysica et Geodaetica Kluwer Academic Publishers 34/3(1990-07-01), 185-196 0039-3169 34:3<185 1990 34 11200 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 465723926 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer