Al-Shayea, NA

King Fahd University of Petroleum and Minerals

 
 
Influence of the source type on the 3-D crosshole tomography 
Al-Shayea, N.A. 
Soils and Foundations 
Vol. 39, Issue.6, 1999 
 
 
Abstract:  A problem which hinders 3-D seismic tomography using the crosshole 
technique is observed, identified, and theoretically explained. The problem relates to the 
phenomenon that the amplitude and phase of the shear wave are not consistent over a 
horizontal plane crossing the wavefront. These variations in amplitude and phase are 
explained based on the theory of shallow earthquakes, which confirms that this 
phenomenon is directly related to the n-value of the source used in the crosshole 
measurements. Polar diagrams are presented for sources with various n-values. Examples 
are also provided for the variation of time records due to the source orientation. 
Furthermore, a procedure is proposed for the determination of the n-value of the source.


Influence of the source type on the 3-D crosshole tomography

https://eprints.kfupm.edu.sa/id/eprint/9367/1/abs_Shayea_jp_11.pdf

Influence of the source type on the 3-D crosshole tomography

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King Fahd University of Petroleum and Minerals