| Abstract: | 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. |
| Genre: | USGS Unnumbered Series |
| ProdID: | 70039542 |
| Citation Author: | Jackson W.H.; Healy, J.H. |
| Citation Contributing Office: | Earthquake Science Center |
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| Citation Language: | English |
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| Citation Number Of Pages: | 28 |
| Citation Online Only Flag: | Y |
| Citation Phsyical Description: | v, 23 p. |
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| Citation Public Comments: | In cooperation with the Defense Advanced Research Projects Agency |
| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Crustal Studies Technical Letter |
| Citation Series Code: | |
| Citation Series Number: | 17 |
| Citation Search Results Text: | Preliminary report on some factors affecting shotpoint efficiency; 1964; USGS Unnumbered Series; 17; Jackson W.H.; Healy, J.H. |
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| Citation Year: | 1964 |
| Type: | citation/reference |
| Text: | Preliminary report on some factors affecting shotpoint efficiency; 1964; USGS Unnumbered Series; 17; Jackson W.H.; Healy, J.H. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/misc/tl/0017/ |
| URL (DOCUMENT): | http://pubs.usgs.gov/misc/tl/0017/tl0017.pdf |
| Date Other: | Sun, 1 Jan 2012 00:00 -0600 |
| Publisher: | U.S. Geological Survey |
