L19_SeismicRefractionII-page2 - unacceptable Special...

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Applied Geophysics – Refraction II Real Earth “flat” layers Although the interfaces between real Earth layers are not perfectly flat, head waves still travel along them Analysis methods: Best-fit straight line through the points provides some kind of average layer thickness and velocity though the error may be
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Unformatted text preview: unacceptable Special analysis techniques: Phantom arrivals Delay time Plus-minus Applied Geophysics Refraction II Phantom arrivals Undulating surface Cannot extrapolate the head wave arrival time curve back to the intercept How do we determine layer thickness beneath the shot, S?...
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