Scientific Reports have recently published a study on the estimation of the co-seismic on-fault offset, diffuse deformation and width of the fault zone for the two main ruptures of the earthquakes that hit Türkiye on the 6 February 2023.
The analysis is based on the measurement of the co-seismic displacement realized with The GDM-OPT-ETQ service of ForM@Ter. The service was run on nine Sentinel-2 tiles to cover the extent of the affected area and on two pairs of Sentinel-2 images to mitigate the effect of the snow and clouds present in the Sentinel-2 acquisition of 9 February 2023. The calculation has been performed on the GEP / Geohazards Exploitation Platform by CNRS/EOST and ESA/SAT.
The location of the rupture and its properties (width, co-seismic offset and diffuse deformation ratio) have been derived systematically along the two main rupture strands and are now publicly available (see Data Availability section). Finally, the results of the satellite analysis have been validated with field measurement, showing a good agreement. It shows that the earthquakes triggered several segments of the East Anatolian Fault System for a total of 310 km and 140 km for the Mw 7.8 and Mw 7.6 mainshocks, respectively. The maximum offsets reach 7.5 ± 0.8 m and 8.7 ± 0.8 m near the epicenters of the Mw 7.8 and Mw 7.6 events, respectively.
Reference:
Provost, F., Karabacak, V., Malet, JP. et al. High-resolution co-seismic fault offsets of the 2023 Türkiye earthquake ruptures using satellite imagery. Sci Rep 14 , 6834 (2024). High-resolution co-seismic fault offsets of the 2023 Türkiye earthquake ruptures using satellite imagery | Scientific Reports