Spatial Extent of Data
USGS Data Source
USGS Thesaurus Keywords
ISO 19115 Topic Category
Other Subject Keywords
Place Keywords
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.
Author(s) |
Christopher P Ely,
Jeffrey R Kennedy |
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 | There was no related primary publication associated with this data release. |
Citations of these data | No citations of these data are known at this time. |
Access | public |
License | http://www.usa.gov/publicdomain/label/1.0/ |
Harvest Date: 2025-08-19T05:09:35.905Z