WSL Institute for Snow and Avalanche Research SLF

Institutional 17.02.2026
28000 historical photographs published
28000 historical photographs published

WSL and SLF have digitised their oldest photography collections. The pictures depict research and everyday life from over 120 years.

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At the edge of the forest, a tree is felled and falls to the ground.
 
Services and products 10.02.2026
20 years of White Risk: avalanche app wins award
20 years of White Risk: avalanche app wins award

A profile of the White Risk avalanche prevention platform, which turns 20 this winter and recently won the Best of Swiss Apps award.

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The graphic shows a mountain landscape with snow and two skiers climbing up a steep snowy slope. Screenshots also show how the ‘White Risk’ prevention platform has developed over the last 20 years from a CD-ROM to an app.
 
Snow and avalanches 09.02.2026
Avalanche winter 1951: forest as protection
Avalanche winter 1951: forest as protection

Forests are the most extensive form of avalanche protection, and after 1951 the SLF and WSL jointly researched sustainable reforestation.

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Black and white aerial photograph of a snow-covered mountain village with forest on the hillside.
 
Snow and avalanches 03.02.2026
Avalanche winter 1951: impetus for hazard maps
Avalanche winter 1951: impetus for hazard maps

After the avalanche winter of 1950/51, the SLF developed a colour code for avalanche-prone areas, forming the basis for today's hazard maps.

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Map section with handwritten markings, lines, and parcel numbers
 

Research for people and the environment in a changing world

NEWS

Logbook
13.02.2026
A surveying instrument is positioned on a tripod in a snowy landscape, with a river and rocky terrain in the background. The scene features mountains rising on either side and a clear sky, indicating early morning or late afternoon light.

You never get used to the Northern Lights

SLF PhD student Pia Ruttner spent six months in Iceland observing avalanches with a laser scanner.

Snow and avalanches
13.02.2026
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Survey: Improve the avalanche danger scale

Together with the European Avalanche Warning Services EAWS, the SLF would like to improve the description of the danger levels. Take part now!

Logbook
04.02.2026
A fluffy skua chick sits on a rock. More rocks can be seen in the background.

Setbacks, Penguins, and a Marathon in Antarctica

Phd student Anja Mödl is currently conducting research in Antarctica. She reports on her work and life at the Station. Part 3.

Institutional
30.01.2026
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Millions for muons: SLF participates in new NCCR

The SLF is using cosmic rays to investigate the snow cover as part of the new National Centre of Competence in Research "Muoniverse".

Institutional
27.01.2026
An audience is gathered in a lecture hall for the WSL-EAWAG Biodiversity Research Day. A sign in the foreground welcomes attendees, while a presentation is displayed on a screen in the background, indicating the event's focus on biodiversity research.

New Biodiversity Center of WSL and Eawag

WSL and Eawag join forces: the new WSL-Eawag Biodiversity Center links research on biodiversity on land and in water.

Logbook
16.01.2026
A vast, snowy landscape stretches toward the horizon under a clear blue sky. Snow-covered mountains are visible in the background. The bright, reflective surface of the snow enhances the sense of openness in this arctic environment.

Festivities and Unforeseen Challenges in the Field

Phd student Anja Mödl is currently conducting research in Antarctica. She reports on her work and life at the Station. Part 2.

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AvaBlog

Our experts analyze the avalanche situation.
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13 February 2026

current AvaBlog (in German)
current AvaBlog (in French)