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MULTIPLY REFLECTED REFRACTIONS IN A SHALLOW LAYER. (1957)

O'BRIEN, P. N. S.

Oxford, UK : Blackwell Publishing Ltd

Geophysical prospecting 5 (1957), S. 0

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ISSN: 1365-2478

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Geosciences , Physics

Notes: A strong late arrival, with several cycles, has been observed in line refraction shooting, for distances ranging from 5000 to 30,000 feet. Using equations given by Officer (1953) it has been possible to establish that this event is a multiply reflected refraction. The conclusive factor was its very large amplitude which was about 60 times that expected for the simple head wave, at the distances involved. The wave-guide was bounded by the surface of the earth and by the base of the Low Velocity layer, at a depth of about 80 feet.An earlier paper (O'Brien, 1957a) gave a study of the head wave pulse refracted from this interface and the conclusions in the two papers are altogether compatible.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-2478.1957.tb01439.x

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