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Preliminary report on some factors affecting shotpoint efficiency

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Citation

Preliminary report on some factors affecting shotpoint efficiency; 1964; USGS Unnumbered Series; 17; Jackson W.H.; Healy, J.H.

Summary

A study of first-arrival amplitudes from 6 water shotpoints and 7 drill-hole shotpoints in parts of central and western United States indicate a variation of over 100 to 1 between the best and poorest shotpoints. Water shotpoints are, in general, superior to drill-hole shotpoints; however, one drill-hole shotpoint produced higher signal amplitudes than more than half of the water shotpoints. Signal amplitudes from drill-hole shotpoints varied by a factor of over 20. Saturated clay shooting medium appears to be the best shooting medium. Amplitudes from water shotpoints varied by a factor of about 10. Signal amplitude increases, in general, with water depth for bottom shots.

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Type Scheme Key
local-index unknown 70039542
local-pk unknown 70039542
series unknown Crustal Studies Technical Letter

Citation Extension

citationTypeReport
journalCrustal Studies Technical Letter
languageEnglish
parts
typePublication Place
valueDenver, CO

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