Multichannel seismic reflection and sonobuoy refraction data in the outer southern California Borderland

1978 ◽  
Author(s):  
James K. Crouch ◽  
M.L. Holmes ◽  
T.H. McCulloh ◽  
A.T. Long ◽  
R.H. Brune
Keyword(s):  
Seismic Reflection ◽  
Southern California ◽  
California Borderland ◽  
Multichannel Seismic Reflection ◽  
Refraction Data

Automated analysis of marine refraction data: A computer algorithm

Geophysics ◽  
1983 ◽  
Vol 48 (5) ◽  
pp. 582-589 ◽  
Author(s):  
C. Patrick Ervin ◽  
L. D. McGinnis ◽  
R. M. Otis ◽  
M. L. Hall
Keyword(s):  
Seismic Reflection ◽  
Automated Analysis ◽  
Computer Algorithm ◽  
Arrival Times ◽  
Multichannel Seismic Reflection ◽  
First Arrival ◽  
Seismic Reflection Profiling ◽  
Refraction Data ◽  
Suppress Noise

A computer algorithm is described that automates the processing of refraction data acquired by conventional, multichannel, seismic reflection profiling, beginning with the determination of the first arrival times and ending with a contoured velocity‐depth section. Traces for several closely spaced shots are first summed to suppress noise. Each stacked trace is convolved with a box operator to convert the first break to a peak that can be detected by the computer. The algorithm calculates intercept times using running averages of slopes. Depths to refractors are plotted and a velocity‐depth profile, interpolated at constant velocity intervals, is printed as a contoured cross‐section. A profile crossing Georges Bank, northwest Atlantic Ocean, is interpreted by both automatic and manual techniques for comparison.

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