| Abstract: | Vibrational seismic sources frequently provide a higher-frequency seismic wavelet (and therefore better resolution) than other sources, and can provide a superior signal-to-noise ratio in many settings. However, they are often prohibitively expensive for lower-budget shallow surveys. In order to address this problem, I designed and built a simple but effective vibrator source for about one thousand dollars. The "EMvibe" is an inexpensive electromagnetic vibrator that can be built with easy-to-machine parts and off-the-shelf electronics. It can repeatably produce pulse and frequency-sweep signals in the range of 5 to 650 Hz, and provides sufficient energy for recording at offsets up to 20 m. Analysis of frequency spectra show that the EMvibe provides a broader frequency range than the sledgehammer at offsets up to ??? 10 m in data collected at a site with soft sediments in the upper several meters. The EMvibe offers a high-resolution alternative to the sledgehammer for shallow surveys. It is well-suited to teaching applications, and to surveys requiring a precisely-repeatable source signature. |
| Genre: | Article |
| ProdID: | 70030670 |
| Citation Author: | Haines, S. S. |
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| Citation End Page: | 15 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Environmental and Engineering Geophysics |
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| Citation Number Of Pages: | 7 |
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| Citation Search Results Text: | Design and application of an electromagnetic vibrator seismic source; 2006; Article; Journal; Journal of Environmental and Engineering Geophysics; Haines, S. S. |
| Citation Start Page: | 9 |
| Citation Volume: | 11 |
| Citation Year: | 2006 |
| Type: | citation/reference |
| Text: | Design and application of an electromagnetic vibrator seismic source; 2006; Article; Journal; Journal of Environmental and Engineering Geophysics; Haines, S. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.2113/JEEG11.1.9 |
| Date Other: | Sun, 1 Jan 2006 00:00 -0600 |
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