High‐Resolution Surface Velocities and Strain for Anatolia From Sentinel‐1 InSAR and GNSS Data

Weiss, Jonathan R.; Walters, Richard J.; Morishita, Yu; Wright, Tim J.; Lazecky, Milan; Wang, Hua; Hussain, Ekbal; Hooper, Andrew J.; Elliott, John R.; Rollins, Chris; Yu, Chen; González, Pablo J.; Spaans, Karsten; Li, Zhenhong; Parsons, Barry

Abstract

Measurements of present‐day surface deformation are essential for the assessment of long‐term seismic hazard. The European Space Agency's Sentinel‐1 satellites enable global, high‐resolution observation of crustal motion from Interferometric Synthetic Aperture Radar (InSAR). We have developed 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 3‐D 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 data 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.

Citation

Weiss, J. R., Walters, R. J., Morishita, Y., Wright, T. J., Lazecky, M., Wang, H., Hussain, E., Hooper, A. J., Elliott, J. R., Rollins, C., Yu, C., González, P. J., Spaans, K., Li, Z., & Parsons, B. (2020). High‐Resolution Surface Velocities and Strain for Anatolia From Sentinel‐1 InSAR and GNSS Data. Geophysical Research Letters, 47(17), Article e2020GL087376. https://doi.org/10.1029/2020gl087376

• Journal Article Type: Article
• Acceptance Date: Jun 18, 2020
• Online Publication Date: Jul 18, 2020
• Publication Date: 2020-09
• Deposit Date: Oct 7, 2020
• Publicly Available Date: Oct 7, 2020
• Journal: Geophysical Research Letters
• Print ISSN: 0094-8276
• Electronic ISSN: 1944-8007
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 47
• Issue: 17
• Article Number: e2020GL087376
• DOI: https://doi.org/10.1029/2020gl087376
• Public URL: https://durham-repository.worktribe.com/output/1260143