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Geodetic Centroid (gCent) Catalog

Metadata Updated: September 17, 2025

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.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date September 14, 2025
Metadata Updated Date September 17, 2025

Metadata Source

Harvested from DOI USGS DCAT-US

Additional Metadata

Resource Type Dataset
Metadata Created Date September 14, 2025
Metadata Updated Date September 17, 2025
Publisher U.S. Geological Survey
Maintainer
Identifier http://datainventory.doi.gov/id/dataset/usgs-604a692ad34eb120311b1339
Data Last Modified 2022-08-18T00:00:00Z
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id b601655f-0986-4619-8d69-a6037b647566
Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
Harvest Source Title DOI USGS DCAT-US
Metadata Type geospatial
Old Spatial -180.0, -90.0, 180.0, 90.0
Source Datajson Identifier True
Source Hash f628197e91cc9b748f2e0279f837849e741530c79aa06fe76ab3ca7f10150a1c
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -180.0, -90.0, -180.0, 90.0, 180.0, 90.0, 180.0, -90.0, -180.0, -90.0}

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