Lesson No. 4: The Elementary Seismic Reflection Problem. I
Published:January 01, 1959
We are now in a position to direct our attention specifically to seismology. Let SS again represent the trace of the plane surface of the earth. Until we are in a position to deal with low-velocity, uphole, elevation and other corrections, we shall assume ideal conditions, among which will be the supposition that the medium immediately below the surface is one for which the velocity is υ, a constant, in all directions. The shot-point, too, is assumed to be at the surface.
Immediately succeeding the shot-point explosion, seismic waves are excited which, by virtue of our assumptions, spread out equally in all directions in the earth. Consider the successive positions of the foremost wave front. It has the form of an expanding hemisphere concentric with the shot-point, whose radius is increasing at a rate equal to the velocity v.
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Lessons in Seismic Computing
“An elementary text and problem book containing 44 lessons in seismology arranged for selection or combination to cover the normal 36-week course, or for condensation into an 18-week course. The lessons begin without assuming more than secondary school mathematics. An elementary knowledge of calculus is desirable, though not required, for the last half of the book.”