REGAT: A permanent GPS network in Algeria, configuration and first results

Area of Science:

• Geodesy
• Tectonics
• Seismology

Background:

• The Nubia-Eurasia plate boundary in the Western Mediterranean is highly seismically active.
• Existing geodetic networks had gaps in coverage for this crucial region.

Purpose of the Study:

• To establish and describe the REGAT geodetic network.
• To provide preliminary GPS velocity data for the Algerian Atlas.
• To improve understanding of plate boundary deformation and seismic hazard.

Main Methods:

• Deployment of 53 continuously-recording GPS stations across the Algerian Atlas.
• Data collection from 2007 onwards, including one site in Tamanrasset.
• Analysis of horizontal GPS velocities to understand crustal deformation.

Main Results:

• The REGAT network spans the Algerian coast and extends 300 km inland.
• Preliminary horizontal GPS velocities reveal deformation patterns across the study area.
• The network covers key active tectonic features.

Conclusions:

• The REGAT network significantly enhances geodetic monitoring in the Western Mediterranean.
• Future expansion will increase spatial resolution for better seismic hazard assessment.
• The study provides crucial data for understanding plate boundary kinematics.