Please use this identifier to cite or link to this item:
|Title:||Effects of source and cavity depths on wave fields in homogeneous half spaces|
Thin layer method
|Citation:||Chai, H.-Y., Goh, S.-H., Phoon, K.-K., Wei, C.-F. (2013-06). Effects of source and cavity depths on wave fields in homogeneous half spaces. Journal of Applied Geophysics 93 : 52-59. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jappgeo.2013.03.009|
|Abstract:||In homogeneous half spaces excited by small buried, spherically symmetric P-wave sources, Rayleigh waves (R-waves) could be generated. The effects of the source depth on the induced wave pattern and propagation behavior of R-waves are analyzed using the thin layer method. When a cavity is present in a homogeneous half space, R-waves could be formed in the scattered wave field. It is found that the energy of R-waves in the incident (direct) surface wave-field is related to the ratio of the source depth to the wavelength of R-waves; R-waves have relatively strong energy when the ratio is less than 1; the buried source induced R-waves approximately travel at the velocity of the planar R-waves in the range of the offset beyond about one wavelength; the energy of R-waves in the back-scattered surface wave-field depends on the ratio of the depth of cavity to the wavelength of R-waves; and for the case of the cavity presented at depths less than one wavelength, R-waves can be clearly observed in the back-scattered wave field. The results are helpful for selecting the source depth and the frequency component in seismic surveys and interpreting both the incident wave and the scattered wave patterns. © 2013 Elsevier B.V.|
|Source Title:||Journal of Applied Geophysics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 15, 2019
WEB OF SCIENCETM
checked on Jan 29, 2019
checked on Dec 29, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.