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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Surface wave inversion ： ウィキペディア英語版 Surface wave inversion Inversion is the set of methods used to infer properties through physical measurements.〔Menke, W., 1989, Geophysical data analysis: Discrete inverse theory. San Diego, Academic Press.〕 Surface wave inversion is the method by which elastic properties, density, and thickness of layers in the subsurface are attained through analysis of surface wavedispersion.〔Haskell, N.A., 1953, Dispersion of surface waves on multilayered media: Bulletin of the Seismological Society of America, v. 43, p. 17-34.〕 The entire inversion process requires the gathering of seismic data, the creation of dispersion curves, and finally the inference of subsurface properties. == Surface waves == Surface waves are seismic waves that travel at the surface of the earth, along the air/earth boundary.〔Dobrin, M., 1951, Dispersion in seismic surface waves: Geophysics, v. 16, p. 63-80.〕 Surface waves are slower than P-waves(compressional waves) and S-waves(transverse waves). Surface waves are classified into two basic types, Rayleigh waves and Love waves. Rayleigh waves travel in a longitudinal manner (the wave motion is parallel to the direction of wave propagation) with particle motion in a retrograde elliptical motion (Figure 1). The Rayleigh waves result from the interaction between P-waves and vertically polarized S-waves.〔 Conversely, Love waves travel in a traverse manner (Figure 1) (the wave motion is perpendicular to the direction of wave propagation), consisting of horizontally polarized S-waves. In seismology, surface waves are collected along with other seismic data, but are traditionally considered noise and an impedance in interpreting deeper reflection and refraction information. Seismologists usually modify seismic equipment and experimental procedures to remove surface wave information from the data. Earthquake seismologists however require the information seismic surface waves provide and thus design their equipment to amplify and gather as much information on these waves as possible. The work by early earthquake seismologists to extract substantial information from surface wave data was the basis for surface wave inversion theory.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Surface wave inversion」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.