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Volume 8 Number 1
  • E-ISSN: 1365-2478

Abstract

A

Measurements have been made of amplitudes of reflected seismic waves, in order to investigate their change as a function of the shotpoint‐seismometer distance and of the position of the reflection point. The change with shotpoint‐seismometer distance, after correction for geometrical divergence, was usually small. This indicates either a rather strong difference between the values of Poisson's ratio for adjacent strata, or, more likely, a rather small value of the absorption coefficient. In one instance a very strong increase in amplitude with shotpoint‐seismometer distance was observed. This may be attributed to incidence near the critical angle. In another instance a pronounced increase in amplitude with the position of the reflection point was observed over a very short distance. This may be due to an elongated depression of the reflecting boundary.

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2006-04-27
2024-04-20

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References

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  • Article Type: Research Article

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