High-resolution surface velocities and strain for Anatolia from Sentinel-1 InSAR and GNSS data

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: https://doi.org/10.1029/2020GL087376.

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Authors

Jonathan Weiss 

Abstract

Measurements of present-day surface deformation are essential for the assessment of long-term seismic hazard. The European Space Agencys Sentinel-1 satellites enable global, high-resolution observation of crustal motion from Interferometric Synthetic Aperture Radar (InSAR). We have developed new automated InSAR processing systems that exploit the first ~5 years of Sentinel-1 data to measure surface motions for the ~800,000 km2 Anatolian region. Our new 3D velocity and strain rate fields illuminate deformation patterns dominated by westward motion of Anatolia relative to Eurasia, localized strain accumulation along the North and East Anatolian Faults, and rapid vertical signals associated with anthropogenic activities and to a lesser extent extension across the grabens of western Anatolia. We show that automatically processed Sentinel-1 InSAR can characterize details of the velocity and strain rate fields with high resolution and accuracy over large regions. These results are important for assessing the relationship between strain accumulation and release in earthquakes.

DOI

https://doi.org/10.31223/osf.io/8xa7j

Subjects

Earth Sciences, Physical Sciences and Mathematics, Tectonics and Structure

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Dates

Published: 2020-02-04 00:03

Last Updated: 2020-05-11 15:33

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License

GNU Lesser General Public License (LGPL) 2.1

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