New satellite view of Tibet's tectonic clash

9 days ago

A study reveals Earth's fault lines are weaker and continents less rigid than previously thought, based on satellite data from the Tibetan Plateau.
High-resolution maps from Copernicus Sentinel-1 satellites show the Tibetan Plateau is being stretched and squeezed by geological movements.
The eastern part of the plateau moves eastwards up to 25 mm per year, while other areas move slower or in opposing directions.
The Tibetan Plateau, formed by the collision of Indian and Eurasian tectonic plates, is the largest continental 'collision zone' on Earth.
Findings challenge previous models of rigid blocks, showing continents can flow due to weak fault zones.
The study provides insights into how continents deform under compression or stretching, recalibrating tectonic theories.
Weakness of the Kunlun Fault allows the plateau's interior to flow eastwards, explaining widespread east-west extension.
Vertical ground movements show areas sinking or rising by up to 5 mm per year.
Data from over 44,000 Sentinel-1 radar images and 14,000 GNSS measurements enabled millimetre-scale velocity mapping.
The study advances understanding of continental deformation and sets a new benchmark for seismic hazard assessment.

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