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Repeat microgravity data from Phoenix, Arizona, 2020-2023

January 8, 2025

This dataset represents the network-adjusted results of relative- and absolute-gravity surveys performed from 2020 to 2023 in and near the city of Phoenix, Arizona. 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 105 stations collected over 4 discrete, annual surveys.

Publication Year 2025
Title Repeat microgravity data from Phoenix, Arizona, 2020-2023
DOI 10.5066/P96Q1OZG
Authors Jeffrey R Kennedy
Product Type Data Release
Record Source USGS Asset Identifier Service (AIS)
USGS Organization Arizona Water Science Center, Tucson Office
Rights This work is marked with CC0 1.0 Universal
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