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Repeat microgravity data from Tucson Basin and Avra Valley, Arizona, 2016-2019

Dates

Publication Date
Start Date
2015-12-15
End Date
2019-04-26
Revision
2019-08-27

Citation

Kahler, L.M., and Landrum, M.T., 2019, Repeat microgravity data from Tucson Basin and Avra Valley, Arizona, 2016-2019 (ver. 2.0, August 2019): U.S. Geological Survey data release, https://doi.org/10.5066/P93513GH.

Summary

This dataset supercedes an earlier data release and includes all previous data in addition to data from 2019. These data represent the network-adjusted results of relative- and absolute-gravity surveys. Relative-gravity surveys were carried out using a Micro-g LaCoste D-series relative-gravity meter. The effect of solid Earth tides and ocean loading were removed from the data. Instrument drift was removed by evaluating gravity change during repeated measurements at one or more base stations. Absolute-gravity surveys were carried out using a Micro-g LaCoste, Inc. A-10 absolute-gravity meter. Vertical gradients between the different measuring heights of the absolute- and relative-gravity meters were measured using a relative-gravity [...]

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Attached Files

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TAMA_AdjustedGravity_2016-2019_tabular.csv 7.38 KB
VersionHistory.txt 239 Bytes
Shapefile: TAMA_AdjustedGravity_2016-2019_vector.zip
TAMA_AdjustedGravity_2016-2019_vector.cpg 5 Bytes
TAMA_AdjustedGravity_2016-2019_vector.dbf 36.92 KB
TAMA_AdjustedGravity_2016-2019_vector.prj 167 Bytes
TAMA_AdjustedGravity_2016-2019_vector.sbn 828 Bytes
TAMA_AdjustedGravity_2016-2019_vector.sbx 172 Bytes
TAMA_AdjustedGravity_2016-2019_vector.shp 1.98 KB
TAMA_AdjustedGravity_2016-2019_vector.shx 652 Bytes

Purpose

Data were collected to evaluate aquifer-storage change. Using the horizontal infinite-slab approximation, gravity data (in units of acceleration, for example, m/s^2), are converted to a thickness of free-standing water, regardless of the depth to or porosity of the interval at which storage-change occurs. Data are not corrected for soil-moisture variation (that is, estimated storage changes include all storage change between the land surface and the aquifer).

Map

Spatial Services

ScienceBase WMS

ScienceBase WFS

Communities

  • USGS Southwest Gravity Program

Associated Items

Tags

Provenance

Revision 2.0 completed on August 27, 2019. To review the changes that were made, see “VersionHistory.txt” in the attached files section.

Additional Information

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Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P93513GH

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