Spatial Extent of Data
USGS Data Source
ISO 19115 Topic Category
Other Subject Keywords
Geodetic Centroid (gCent) Catalog
The gCent Catalog is a repository of earthquake centroids and finite fault source information derived from geodetic observations (Shea & Barnhart, 2022). This database additionally includes the fully processed Interferomatric Synethtic Aperture (InSAR) images (unwrapped interferograms) and line-of-sight (LOS) files that were used to derived the cataloged source parameters. Geodetic observations from InSAR provide valuable measurements of ground displacements caused by earthquakes. These spatially-dense (10s of meters per pixel), near-source observations of ground displacement in turn allow for the well-constrained analysis of the spatial characteristics of earthquakes, including their centroid location, depth, dimensions, orientation, and slip magnitude. These source parameters in turn can inform earthquake response products (i.e., ShakeMap, PAGER) and be used to calibrate or compare seismological information (i.e., ComCat). Additionally, the InSAR images ("interferograms") can provide important details about surface ruptures, secondary ground failure (i.e., surface cracking, triggered fault creep, liquefaction, and landslides) that help to guide post-earthquake field surveys. The proliferation of openly available SAR imagery and more reliable image acquisition frequency yield the opportunity to systematically characterize earthquakes with InSAR and incorporate these results into operational earthquake monitoring.
Author(s) | William D Barnhart, Hannah N Shea |
Publication Date | 2022-08-18 |
Beginning Date of Data | 2019-08-01 |
Ending Date of Data | 2022-08-17 |
Data Contact | |
DOI | http://dx.doi.org/10.5066/P9JBE32J |
Citation | Barnhart, W.D., and Shea, H.N., 2022, Geodetic Centroid (gCent) Catalog: U.S. Geological Survey data release, http://dx.doi.org/10.5066/P9JBE32J. |
Metadata Contact | |
Metadata Date | 2022-08-18 |
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: 2024-09-03T10:21:07.825Z