Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
ELASTIC-WAVE SCATTERING IN A RANDOM MEDIUM CHARACTERIZED BY THE VON-KARMAN CORRELATION-FUNCTION AND SMALL-SCALE INHOMOGENEITIES IN THE LITHOSPHERE
Autore:
TRIPATHI JN; RAM A;
Indirizzi:
UNIV ALLAHABAD,DEPT EARTH & PLANETARY SCI ALLAHABAD 211002 UTTAR PRADESH INDIA BANARAS HINDU UNIV,DEPT GEOPHYS VARANASI 221005 UTTAR PRADESH INDIA
Titolo Testata:
Geophysical journal international
fascicolo: 3, volume: 131, anno: 1997,
pagine: 682 - 698
SICI:
0956-540X(1997)131:3<682:ESIARM>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
MULTIPLE-SCATTERING; CODA WAVES; AMPLITUDE ATTENUATION; SHEAR-WAVES; P-WAVES; LASA; TIME; NORSAR;
Keywords:
INHOMOGENEITY; RANDOM MEDIUM; SCATTERING; VON KARMAN CORRELATION FUNCTION;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
J.N. Tripathi e A. Ram, "ELASTIC-WAVE SCATTERING IN A RANDOM MEDIUM CHARACTERIZED BY THE VON-KARMAN CORRELATION-FUNCTION AND SMALL-SCALE INHOMOGENEITIES IN THE LITHOSPHERE", Geophysical journal international, 131(3), 1997, pp. 682-698

Abstract

A Gaussian correlation function characterizes smoothly heterogeneous media, while real heterogeneities in the Earth are often non-Gaussian in nature. Using the Born approximation, mean square amplitudes of thescattered waves have been derived for an elastic media characterized by the Von Karman correlation function. Heterogeneities with differentpower laws can be defined by the Von Karman correlation function. Thesensitivity of fore-and backscattering to heterogeneities with different scales and properties (that is velocity and impedance) is discussed in this paper. The analytical expression for total scattered energy for the incident P waves is also derived for a random medium having the Von Karman correlation function. We find that at high frequencies, the scattered power of converted waves is a function of frequency. In the case of coda-wave excitation by local earthquakes, which must be handled by the full elastic-wave theory, we can define any type of inhomogeneity by the Von Karman correlation function. It also supports the idea that the lithosphere might have multiple-scale inhomogeneities.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 13:42:38