dc.contributor.author | Keiswetter, Dean | |
dc.contributor.author | Steeples, Don W. | |
dc.date.accessioned | 2015-03-31T19:11:19Z | |
dc.date.available | 2015-03-31T19:11:19Z | |
dc.date.issued | 1994-10-01 | |
dc.identifier.citation | Keiswetter, D. & Steeples, D. (1994), Practical modifications to improve the sledgehammer seismic source. Geophysical Research Letters, 21: 2203–2206, http://www.dx.doi.org/10.1029/94GL01957 | en_US |
dc.identifier.issn | 0094-8276 | |
dc.identifier.uri | http://hdl.handle.net/1808/17257 | |
dc.description | This is the publisher's version, also available electronically from "http://onlinelibrary.wiley.com". | en_US |
dc.description.abstract | We have examined frequency and amplitude changes in high-resolution seismic-reflection data associated with practical modifications to the sledgehammer method. Our seismic data, acquired at three sites with different near-surface geology, demonstrate the effects of seating the plate prior to recording, of centered versus noncentered impacts, of subsurface plate emplacement, of various plate-surface covers, and of aluminum versus steel impact plates. Impacts on well-seated plates produced as much as 4 dB higher seismic amplitude than data recorded using unseated plates, and increased the ratio of high-to-low frequencies. Sledgehammer impacts on the edge of the plate decreased seismic amplitude by 6 to 12 dB for frequencies above 100 Hz compared to centered impacts. Placement of the impact plate 1 meter below the ground surface produced a 12 dB amplitude increase for frequencies above 130 Hz at one test site. Plates made of either steel alloy or aluminum produced equivalent seismic signals. The site-dependent nature of some of our results suggests that other investigators may benefit from conducting similar experiments prior to acquiring shallow seismic-reflection data when using the sledgehammer source. | en_US |
dc.publisher | American Geophysical Union | en_US |
dc.title | Practical modifications to improve the sledgehammer source | en_US |
dc.type | Article | |
kusw.kuauthor | Keiswetter, Dean | |
kusw.kuauthor | Steeples, Don W. | |
kusw.kudepartment | Geology | en_US |
dc.identifier.doi | 10.1029/94GL01957 | |
kusw.oaversion | Scholarly/refereed, publisher version | |
kusw.oapolicy | This item does not meet KU Open Access policy criteria. | |
dc.rights.accessrights | openAccess | |