Natural Hazards and Earth System Sciences
Natural Hazards and Earth System Sciences
NHESS
Articles | Volume 26, issue 2
Articles | Volume 26, issue 2
https://doi.org/10.5194/nhess-26-863-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-26-863-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 2
Research article
 | 
23 Feb 2026
Research article |  | 23 Feb 2026

Beyond and beneath displacement time series: towards InSAR-based early warnings and deformation analysis of the Achoma landslide, Peru

Benedetta Dini, Pascal Lacroix, and Marie-Pierre Doin

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Short summary
Landslides can occur without warning. Traditional satellite radar (InSAR) methods are valuable but have limitations. We show that lesser-used radar signals can act as early warning markers, revealing instability up to five years before failure in a Peruvian landslide, even when standard methods fail or underestimate displacement. These alternative radar approaches complement existing techniques and could transform early detection and targeted monitoring across large regions.
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