Mapping ground deformation in Turkey after earthquake using SAR imagery

Aggelos Kalafatis; Aggeliki Kyriou; Konstantinos Nikolakopoulos

doi:10.1117/12.2679466

19 October 2023 Mapping ground deformation in Turkey after earthquake using SAR imagery

Aggelos Kalafatis, Aggeliki Kyriou, Konstantinos Nikolakopoulos

Proceedings Volume 12734, Earth Resources and Environmental Remote Sensing/GIS Applications XIV; 1273416 (2023) https://doi.org/10.1117/12.2679466
Event: SPIE Remote Sensing, 2023, Amsterdam, Netherlands

Abstract

Synthetic Aperture Radar (SAR) interferometry has been deemed as an effective technique for the monitoring of earthquake-induced ground deformation since the early 1990s. Thereafter, several scientists have been engaged in understanding earthquake deformation using active remote sensing sensors. The East Anatolian Fault (EAF) constitute the major tectonic fracture in the wider region of Turkey and Middle East. In fact, this strike-slip fault zone regulates the tectonic movement between the Anatolian and the Arabian microplates. On February 6th, 2023, doublet earthquakes occurred on the southern part of EAF. The event has reported among the most devastating of 20th century. In this regard, the current research focuses on the mapping and analysis of ground deformation occurred in the wider area using spaceborne radar imagery. In this context, Sentinel-1 data covering the area was obtained and processed through Differential SAR interferometry (InSAR) and pixel offset method. In addition, ALOS-2 PALSAR-2 images were submitted to change detection approach based on the subtraction of two SAR images. The main difference between the two sensors is: a) Band difference i.e. Sentinel-1 is a C-band mission while ALOS-2 PALSAR is a L-band, b) different polarization. The analysis of the results revealed the spatial distribution of the ground deformation along the EAF. The observed deformation is in line with a left-lateral fault type.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Aggelos Kalafatis, Aggeliki Kyriou, and Konstantinos Nikolakopoulos "Mapping ground deformation in Turkey after earthquake using SAR imagery", Proc. SPIE 12734, Earth Resources and Environmental Remote Sensing/GIS Applications XIV, 1273416 (19 October 2023); https://doi.org/10.1117/12.2679466

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KEYWORDS

Deformation

Earthquakes

Stanford Linear Collider

Synthetic aperture radar

Interferometry

Image processing

Interferograms

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