Source-dependent frequency content of ultrashallow seismic reflection data

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Issue Date
2000-04-01Author
Baker, Gregory S.
Steeples, Don W.
Schmeissner, Chris M.
Spikes, Kyle T.
Publisher
Seismological Society of America
Type
Article
Article Version
Scholarly/refereed, publisher version
Published Version
http://bssa.geoscienceworld.org/content/90/2/494Metadata
Show full item recordAbstract
Seismic surveying within the upper few meters of the Earth's shallow subsurface requires a high-frequency source. To ascertain the important features of such sources, experiments were conducted at test sites in central and eastern Kansas using various impulsive seismic sources (4.5-kg hammer, 30.06 rifle, and .22-caliber rifle) to examine the effects of minimizing source energy on the frequency content of reflection data. Results indicate that the higher energy near-surface seismic-reflection sources (e.g., sledgehammer, large-caliber projectiles) lack some of the high-frequency energy exhibited by smaller sources, precluding the detection of reflection signal from ultrashallow depths (<3 m) at the sites tested. At the test site in eastern Kansas, the .22-caliber rifle yielded more energy above 250 Hz than either the sledgehammer or 30.06 rifle. At the test site in central Kansas, where three reflective interfaces shallower than 3 m exist, the .22-caliber rifle with subsonic ammunition yielded the largest amount of energy at frequencies above 300 Hz and produced the best data.
Description
This is the publisher's version, also available electronically from "bssa.geoscienceworld.org".
ISSN
0037-1106Collections
- Geology Scholarly Works [247]
Citation
Baker, G., Steeples, D., Schmeissner, C., & Spikes, K. (2000). Source-Dependent Frequency Content of Ultrashallow Seismic Reflection Data. Bulletin of the Seismological Society of America, 90(2), 494-499.
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