| Abstract: | Repeated high-precision gravity measurements using an automated gravimeter and analysis of time series of 1-Hz samples allowed gravity measurements to be made with an accuracy of 5 ??Gal or better. Nonlinear instrument drift was removed using a new empirical staircase function built from multiple station loops. The new technique was developed between March 1999 and September 2000 in a pilot study conducted in the southern Salt Lake Valley along an east-west profile of eight stations from the Wasatch Mountains to the Jordan River. Gravity changes at eight profile stations were referenced to a set of five stations in the northern Salt Lake Valley, which showed residual signals of <10 ??Gal in amplitude, assuming a reference station near the Great Salt Lake to be stable. Referenced changes showed maximum amplitudes of -40 through +40 ??Gal at profile stations, with minima in summer 1999, maxima in winter 1999-2000, and some decrease through summer 2000. Gravity signals were likely a composite of production-induced changes monitored by well-water levels, elevation changes, precipitation-induced vadose-zone changes, and local irrigation effects for which magnitudes were estimated quantitatively. ?? 2008 Society of Exploration Geophysicists. All rights reserved. |
| Genre: | Article |
| ProdID: | 70032906 |
| Citation Author: | Gettings, P.; Chapman, D. S.; Allis, R. |
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| Citation Issue: | 6 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geophysics |
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| Citation Search Results Text: | Techniques, analysis, and noise in a Salt Lake Valley 4D gravity experiment; 2008; Article; Journal; Geophysics; Gettings, P.; Chapman, D. S.; Allis, R. |
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| Citation Volume: | 73 |
| Citation Year: | 2008 |
| Type: | citation/reference |
| Text: | Techniques, analysis, and noise in a Salt Lake Valley 4D gravity experiment; 2008; Article; Journal; Geophysics; Gettings, P.; Chapman, D. S.; Allis, R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1190/1.2996303 |
| Date Other: | Tue, 1 Jan 2008 00:00 -0600 |
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