Natural Hazards and Earth System Sciences
Natural Hazards and Earth System Sciences
NHESS
Articles | Volume 26, issue 1
Articles | Volume 26, issue 1
https://doi.org/10.5194/nhess-26-449-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-26-449-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 1
Research article
 | 
23 Jan 2026
Research article |  | 23 Jan 2026

Dynamic analysis of flowlike landslides at Brienz/Brinzauls, Graubünden, Switzerland

Jordan Aaron, Larissa de Palézieux, Jake Langham, Valentin Gischig, Reto Thoeny, and Daniel Figi

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Short summary
In mid-May, 2023, the village of Brienz/Brinzauls in the Swiss canton of Graubunden was evacuated, and one month later a flowlike landslide emplaced with velocities of ~25 m/s and narrowly missed impacting the village. Landslides at this site have emplaced with velocities that can vary by 5 order-of-magnitude, a puzzling observation which we analyse in the present work. Our results show that the range of scenarios usually considered in landslide risk analyses must be expanded.
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