Articles | Volume 26, issue 2
https://doi.org/10.5194/nhess-26-863-2026
https://doi.org/10.5194/nhess-26-863-2026
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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Cited articles

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Badoux, A., Graf, C., Rhyner, J., Kuntner, R., and McArdell, B. W.: A debris-flow alarm system for the Alpine Illgraben catchment: design and performance, Nat. Hazards, 49, 517–539, 2009. 
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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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