GPS Data for Earthquake Analysis in Southern California

1991 to present GPS data archived by the Southern California Earthquake Center (SCEC) Data Center. The collection includes raw and RINEX format GPS measurements, site descriptions, log sheets, and processed solution files. Data results from collaborative efforts by SCEC, USGS, and other organizations.

Use Cases

• Analyze crustal deformation from RINEX format GPS data to model post-earthquake relaxation, such as after the 1992 Landers event.
• Correlate long-term GPS position time-series (from 1994 onward) with seismic activity to identify strain accumulation patterns.
• Use site index and data index files to locate and join specific measurement files with their corresponding site description log sheets.
• Process raw GPS data into solution files for estimating fault slip rates and regional tectonic velocities.

Strengths

• Data spans from 1991 to the present, providing over 30 years of temporal coverage.
• Includes multiple data types: raw GPS, RINEX data, site logs, indexes, and processed solution files.
• Structured archive organization by year, file type, and day of year for efficient data retrieval.

Limitations

• Specific row counts, file sizes, and total number of measurement sites are not provided.
• Data coverage is geographically focused on Southern California, limiting global applicability.
• The description does not specify the frequency or completeness of measurements for all sites over time.

Provenance

Source

Southern California Earthquake Center (SCEC) Data Center, with data from SCEC, USGS, and other collaborative organizations.

Collection Method

GPS measurements collected from field surveys and continuous stations, archived in RINEX format after quality checks.

Time Range

1991 to present, with specific surveys noted for 1991, 1992, and 1994 onward.

Freshness

null

Geography

Southern California, USA, with mentions of San Bernardino County and regions affected by the Landers earthquake.