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Repeat microgravity data from Anza Valley, California, 2019-2023

This dataset represents the network-adjusted results of relative- and absolute-gravity surveys performed from 2019 to 2023 in and near Anza Valley, California. Relative surveys were done using a Zero Length Spring, Inc. Burris relative-gravity meter. Absolute-gravity surveys were done using a Micro-g LaCoste, Inc. A-10 absolute-gravity meter. The effect of solid Earth tides and ocean loading were removed from the data prior to network adjustment. Non-linear instrument drift was removed by evaluating gravity change during repeated measurements at one or more base stations. Vertical gradients between the relative- and absolute-gravity meters were measured at each station where both types of measurement were collected to correlate the measurements of the two instruments. Vertical gradients were measured using a relative-gravity meter and tripod set to the height of the absolute-gravity meter. Relative-gravity differences and absolute-gravity data were combined using least-squares network adjustment, as implemented in the software GSadjust (https://code.usgs.gov/sgp/gsadjust). Data are provided for 35 stations collected over 7 discrete surveys.

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Author(s) Christopher P Ely, Jeffrey R Kennedy orcid, Allen H Christensen orcid
Publication Date 2024-12-01
Beginning Date of Data 2020-09-21
Ending Date of Data 2023-09-11
Data Contact
DOI https://doi.org/10.5066/P9DJ23US
Citation Ely, C.P., Kennedy, J.R., and Christensen, A.H., 2024, Repeat microgravity data from Anza Valley, California, 2019-2023: U.S. Geological Survey data release, https://doi.org/10.5066/P9DJ23US.
Metadata Contact
Metadata Date 2025-04-30
Related Publication
Citations of these data No citations of these data are known at this time.
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License http://www.usa.gov/publicdomain/label/1.0/
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Harvest Source: ScienceBase
Harvest Date: 2025-08-19T05:09:35.905Z