On: HAWKIN’S PAPER “THE RECIPROCAL METHOD OF ROUTINE SHALLOW SEISMIC REFRACTION INVESTIGATIONS” (GEOPHYSICS, DECEMBER, 1961, PP. 806–819)

Geophysics ◽  
1962 ◽  
Vol 27 (4) ◽  
pp. 534-535
Author(s):  
J. G. Hagedoorn
Keyword(s):  
Small Group ◽  
Seismic Refraction ◽  
Review Article ◽  
Shallow Seismic ◽  
Reciprocal Method ◽  
Excellent Article

The “Review Article” by L. V. Hawkins in the December 1961 issue of Geophysics is an excellent article on the method used by a certain small group for the interpretation of shallow refraction work. However, it does not seem to give an unbiased review of methods generally used for this purpose and it describes a method that is rather unnecessarily complicated.

Experience with the generalized reciprocal method of seismic refraction interpretation for shallow engineering site investigation

Geophysics ◽  
1986 ◽  
Vol 51 (2) ◽  
pp. 255-265 ◽  
Author(s):  
P. J. Hatherly ◽  
M. J. Neville
Keyword(s):  
Seismic Refraction ◽  
Site Investigation ◽  
Complex Environments ◽  
Site Investigations ◽  
Shallow Seismic ◽  
South Wales ◽  
Refraction Method ◽  
Close Cooperation ◽  
Processing Techniques ◽  
Reciprocal Method

The shallow seismic refraction method has been used routinely during the initial investigation at many dam sites in New South Wales. By using computer processing techniques and advanced interpretational features of the generalized reciprocal method, it has been possible to derive a picture of the subsurface layering from the refraction results even in geologically complex environments. Close cooperation between the geophysicist and geologist is necessary to ensure proper use of the seismic results. The results may be used to guide subsequent drilling programs and to aid design and construction. This approach to engineering site investigations is demonstrated with results from two recent investigations.

THE RECIPROCAL METHOD OF ROUTINE SHALLOW SEISMIC REFRACTION INVESTIGATIONS

Geophysics ◽  
1961 ◽  
Vol 26 (6) ◽  
pp. 806-819 ◽  
Author(s):  
L. V. Hawkins
Keyword(s):  
Numerical Computation ◽  
Delay Time ◽  
Reliable Method ◽  
Seismic Refraction ◽  
Velocity Analysis ◽  
Travel Times ◽  
Shallow Seismic ◽  
The Absolute ◽  
The Individual ◽  
Reciprocal Method

The Reciprocal Method of shallow seismic refraction investigation provides a simple reliable method of surveys where the absolute depths to important refractors and an analysis of the velocities in the refractors are required in detail. The depth computation is based on an early (1931) concept, termed here the time‐depth, which differs slightly from the delay‐time. The calculation of the individual time‐depths and of the corrected travel times within the refractor require only simple numerical computation. Hence, the method is very suitable for routine survey procedures in which use is made of composite velocity terms for multilayered overburdens. The basis and procedures of the Reciprocal Method are presented together with examples illustrating the application of the method and the technique of velocity analysis.

Sign in / Sign up

Export Citation Format

Share Document