Computing the head wave coefficient with multi-fold near-surface seismic refraction data

Derecke Palmer

doi:10.1080/22020586.2019.12072940

2nd Australasian Exploration Geoscience Conference: Data to Discovery

ISSN: 2202-0586
E-ISSN:

oa Computing the head wave coefficient with multi-fold near-surface seismic refraction data
Authors Derecke Palmer^a
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^a The University of New South Wales, Sydney, 2052, Australia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2019, Issue 2nd Australasian Exploration Geoscience Conference: Data to Discovery, Dec 2019, p. 1 - 4
DOI: https://doi.org/10.1080/22020586.2019.12072940
- Published online: 01 Dec 2019

Abstract

Summary

Head wave amplitudes are dominated by an extremely rapid decrease with increasing source-to-receiver separation. Nevertheless, the standard corrections for geometric spreading are usually quite adequate and are not critical with multi-fold reversed refraction data.

The head wave coefficients (HWC), which are the refraction analogue of the reflection coefficients, are essentially equivalent at coincident sources and receivers. It supports a 2D revision of the standard 1D head wave expression. HWCs can be readily computed with a variety of methods using both the measured head wave amplitudes and full waveform refraction images.

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2019-12-01

2026-01-17

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References

Červený, V., Ravindra, R., 1971, Theory of seismic head waves, University of Toronto Press, Toronto.
Palmer, D, 2001a, Imaging refractors with the convolution section, Geophysics 66, 1582-1589.
Palmer, D, 2001b, Resolving refractor ambiguities with amplitudes, Geophysics 66, 1590-1593.
Palmer D. 2009. Integrating short and long wavelength time and amplitude statics. First Break 27(6), 57–65.
Palmer, D., 2013, Resolving complex structure in near-surface refraction seismology with common offset gathers: The Leading Edge, 32, 680-690.
Palmer, D., 2015, Is accuracy more important than precision in near surface refraction seismology? Near Surface Geophysics, 13, 1-18.

/content/journals/10.1080/22020586.2019.12072940

Article Type: Research Article

Keyword(s): amplitudes; full waveform imaging; head wave coefficient; refraction

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