On January the 7th, 2022 a Mw6.6 earthquake stroke China in the region of Jinchang. The rupture occurred on a strike-slip fault with an hypocenter located at a depth of 13 km (USGS report here). The coseismic displacement has been measured using the MPIC-OPT-ETQ service and the SNAP service that are available on the Geohazard Exploitation Platform GEP.
MPIC-OPT-ETQ is an EO service based on the image correlation algorithm MicMac and it provides metric measurements of horizontal displacements from Sentinel-2 images. The result shows that the rupture reached the surface and that the ground moved of around 2 meters along the fault in the East-West direction.
Coseismic displacements computed with the MPIC-OPT-ETQ service on GEP. Contains modified Copernicus Sentinel data.
SNAP is an InSAR service providing ground motion measurements retrieved from the phase difference between two Sentinel-1 acquisitions. The descending track of Sentinel-1 allows to compute a coseismic interferogram at 12 days. The ground motion in the Line of Sight (LOS) direction is smaller than the one measured with MPIC-OPT-ETQ due to the high density of fringes and coherence loss occurring in the vicinity of the fault.
Wrapped interferogram computed with the SNAP service on GEP Contains modified Copernicus Sentinel data.
Unwrapped interferogram computed with the SNAP service on GEP Contains modified Copernicus Sentinel data.
All results can be visualized on GEP here.