Measurment of earth surface deformation using advanced Differential SAR Interometry: case study of Al Hoceїma region in Morocco

Khalid Ghzala; Desire Muhire; Yassine Tounsi; Abdelkrim Nassim

doi:10.1117/12.2600328

12 September 2021 Measurment of earth surface deformation using advanced Differential SAR Interometry: case study of Al Hoceїma region in Morocco

Khalid Ghzala, Desire Muhire, Yassine Tounsi, Abdelkrim Nassim

Author Affiliations +

Proceedings Volume 11861, Microwave Remote Sensing: Data Processing and Applications; 118610D (2021) https://doi.org/10.1117/12.2600328
Event: SPIE Remote Sensing, 2021, Online Only

Abstract

Differential SAR interferometry (DInSAR) is an effective remote sensing technique for determining land surface deformation and displacement. The earlier limitations of this technique were the loss of coherence and the presence of atmospheric noise. For this reason, advanced DInSAR techniques, such as Persistent scatterer InSAR (PS-InSAR) and Short Baseline InSAR (SB-InSAR), have been proposed to overcome these limitations by exploiting multiple interferograms. The region studied in this work is the city of Al Hoceima located in Morocco. This region is characterized by dynamic seismic activity that induced several earthquakes between May 27, 2015, and April 27, 2016, where several magnitudes ranging from 3.9 to 6.3 Mw (on 01/25/2016) were measured. 19 Sentinel-1 Single Look Complex (SLC) images of this region of Al Hoceima were exploited in this work, and a three-pass DInSAR approach in SB-InSAR was used to correct topographic errors when generating velocity maps. The analysis of United States Geological Survey (USGS) seismic data showed an increase of 1 magnitude (Mw)/day at a constant rate over time in the region. The effects of the disaster on the region were shown by a rapid rate of ground subsidence velocity at a rate of more than -23 cm/year in the year of observation.

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Citation Download Citation

Khalid Ghzala, Desire Muhire, Yassine Tounsi, and Abdelkrim Nassim "Measurment of earth surface deformation using advanced Differential SAR Interometry: case study of Al Hoceїma region in Morocco", Proc. SPIE 11861, Microwave Remote Sensing: Data Processing and Applications, 118610D (12 September 2021); https://doi.org/10.1117/12.2600328

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