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Landslide activity shifted earlier in the year in the European Alps

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Research area:environment-climate

What the study found

The study found four seasonal patterns of landslide occurrence in the European Alps. It also reports a shift toward landslide activity happening earlier in the year, which the authors link to rising air temperatures and changing precipitation patterns.

Why the authors say this matters

The authors frame landslides as a major natural hazard in mountain regions that threatens human safety, infrastructure, and ecosystems. The study suggests that understanding how meteorological changes relate to landslide timing may help explain regional impacts of climate change.

What the researchers tested

The researchers analyzed instrumental records from 849 seismic stations in the European Alps from 2000 to 2023 using an automated seismic data exploration method. This produced a catalog of 926 seismogenic landslides, and the Alps were divided into 142 massifs based on altitude and slope properties for further analysis.

What worked and what didn't

Six massifs had more than 30 landslides each, which allowed the authors to cross-correlate landslide activity with monthly variations in air temperature, precipitation, snow cover, and snow melt before and after 2010. The massifs with the highest landslide counts had lower average air temperatures, higher annual precipitation, and a larger channel steepness index, and the authors report a shift toward earlier-in-the-year activity linked to warming of 0.5°C–2°C and changing precipitation patterns.

What to keep in mind

The analysis is limited to the European Alps and to massifs with the highest numbers of detected landslides for detailed comparison. The abstract does not describe additional limitations beyond this scope.

Key points

  • The study identified 926 seismogenic landslides in the European Alps from 2000 to 2023.
  • Four seasonal patterns of landslide occurrence were reported.
  • Landslide activity shifted earlier in the year and was linked to rising air temperatures and changing precipitation patterns.
  • The highest-landslide massifs had lower average temperatures, higher annual precipitation, and a larger channel steepness index.
  • Six massifs had more than 30 landslides, enabling before-and-after 2010 comparisons.

Disclosure

Research title:
Landslide activity shifted earlier in the year in the European Alps
Authors:
Charlotte Groult, Clément Hibert, Jean‐Philippe Malet, Bastien Mathieux
Institutions:
Centre National de la Recherche Scientifique, Centre National de la Recherche Scientifique, Centre National de la Recherche Scientifique, Centre National de la Recherche Scientifique, École & Observatoire des Sciences de la Terre, École & Observatoire des Sciences de la Terre, Institut Terre & Environnement de Strasbourg, Institut Terre & Environnement de Strasbourg, Institut Terre & Environnement de Strasbourg, Institut Terre & Environnement de Strasbourg, Observatoire astronomique de Strasbourg, Observatoire astronomique de Strasbourg, Université de Strasbourg, Université de Strasbourg, Université de Strasbourg, Université de Strasbourg
Publication date:
2026-03-30
DOI:
10.1029/2024jf008209
OpenAlex record:
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AI provenance: This post was generated by gpt-5.4-mini (OpenAI). The original authors did not write or review this post.

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