Interactive trail game in the heart of the old town of Sion


Official opening of the trail

Monday 19 April 2021






Thanks to the financial support of:

La ville de Sion La Bourgeoisie de Sion

Service Sismologique Suisse (SED)

ETH Zürich  HES-SO Valais-Wallis


 service sismologique suisse SED1

ETH Zürich1

HES-SO général1




The people in charge of the CPPS Earthquakes 1946 project


Project manager (conception & design) Anne Sauron
Technical manager of the project Alain Rittiner
Responsible for the sismo workshops Romain Roduit



Earthquakes 1946

Prepared by the “Centre Pédagogique Prévention Séismes” (CPPS), a trail of 13 educational and fun stations in the historic centre of Sion allows visitors to learn more about earthquakes by understanding what happened on 25 January 1946 and during that year. The aim of the tour is to raise awareness of the need for public and individual preparation for a future earthquake. At the beginning of 2021, workshops for children (construction of a seismograph) will be organised by the CPPS.

The trail is a self-guided tour through the streets in the historic centre of Sion, starting from the Tourist Office, available from 22 February 2021. The creation of the trail has benefited from the support of the Commune and Bourgeoisie of Sion, the Swiss Seismological Service (SED) of ETH Zurich and the HES-SO Valais-Wallis.

For more information, please visit the CPPS website:


Contact: or

The map




carte news parcours site internet CPPS


Example of an educational post

exemple totem 6637544381269992750



What happened in 1946?



Why is this tour in the heart of the old town of Sion?


Switzerland is a seismic country and it is in the canton of Valais that the seismic risk is the highest. Knowing and understanding the seismic risk is therefore fundamental in order to be well prepared and to take adequate preventive measures.

It is in this spirit that the 75th anniversary of the earthquakes of 1946, major events that marked our canton, will be commemorated.

The "Earthquake of 25 January 1946 treasure hunt”, which is part of this commemoration, is intended for the general public, children and families.

The aim of this game is to raise awareness about the risks from earthquakes by using knowledge gained from the 1946 earthquake and its aftershocks.

This route through the old town of Sion is created using the GuidiGO app, which has a wide range of options to create a fun and stimulating treasure hunt. This game features Wallis, "the seismograph mascot" and 13 interactive stops that can be equipped with 3D objects, enlivened by the audio guides.

Some explanations about the trail


This game features "Wallis, seismograph mascot of the CPPS" whose mission is to guide the players step by step through the old town of Sion. This trail uses 2 communication supports:


wallis 75ème_1                                                   Guidigo


- The first is the GuidiGo web application (Fig. 1) which allowed us to create a guided, geolocated tour to create interactive games as well as provide scientific content.

- The second corresponds to the posters present at each stop (Fig2). For 4 of these stops, 3D objects will be installed. They will be supported by audio guides and video animations from the GuidiGo web application.

This route comprises 12 stops, including the start and finish posts. The scientific content of each stop are distinct and self contained. This means that players do not have to complete the entire route in order to participate. They can choose the stages that interest them.

At each stop, games in the form of quizzes allow players to earn points. The aim of the game is to accumulate the maximum number of points.

Information and management of the route with GuidiGO


To accompany you on your journey through the city, we suggest you download the GuidiGO application for free on your cell phones

Application GudiGO

Search in GuidiGO

• Suisse

• 1946

Choose the desired language





  • The proposed course is composed of 13 steps that we call "totems
  • These totems are all 2.50m high and 1.25m wide. They are divided into 2 distinct parts, namely:

• A poster in the upper vertical part of the totem

• A 3D animation in the form of rotating cubes and triangles, booklets with pages to turn, pieces to move and position just in a didactic path, padlocks with a combination to discover to have a good answer, etc.

Each totem works in association with the GuidiGO application. You can find explanations, photos, videos, diagrams, additional information, drawings, etc.

  • GuidiGo has also been designed so that visually impaired people can discover the route and learn about the 1946 earthquake, the dangers to be aware of and the measures to take before, during and after an earthquake
  • To motivate the visitors, there is the possibility to participate in a game by answering questions related to the proposed didactic path. The participant can accumulate points and rewards. The schools that participate with their students can challenge them by making a small internal classification.
  • At the end of the course, we invite all the participants, their families, their friends and all the population of our country to come and visit us in our new CPPS Campus at the rue de l'Industrie 21 in Sion from January 2022

It takes about 2 good hours to do the whole course



The team of realization of the totems without which the project could not have succeeded :


Graphics Artéclik création Frédéric Gaillard
Translation German Laurence Laffargue-Rieder
  English Paul Denton
  French Francesco Pacchiani
Relecture   Serge Monnier
Collaborators Créalp Antonio Abellan
    Léa Maillard
    Pascal Morard
    Dario Tosoni
  Cantonal Archives Alain Dubois
    Mélanie Clivaz
    Mathieu Emonet
  Etat du Valais, Natural Hazards Service Guillaume Favre-Bulle
    Philippe Gsponer
    Francesco Pacchiani
    Alexandre Vogel
Realization and technical assemblies totems Ateliers HEI de la HES-SO Valais Wallis David Berthouzoz
    Youri Bocquel
    Caryl Emery
    Pierre-André Knupfer
    Thibault Métrailler
  Roccia metal constructions Sàrl Jimmy Roccia et son équipe
Printer Enseigne des Collines Patrick Truffer
Calculation of the wind resistance of totems HEI - HES-SO Valais Wallis Laurent Rapillard
Insurance Agence générale du Valais romand Stéphane Monnet
    Stéphane Baudin
Installation of the totems on site Ville de Sion L'équipe de la voirie
Partner companies Base plates Debrunner Acifer AG, Viège
  Framing and frames Item Industrietechnik, Schlatt
  Sheets and supports Stabitec AG, Steg
  General handling Location Budget Sàrl, Conthey
  Transportation Remorque Lerjen, Conthey
  Wind counterweight Hornbach, Riddes
  Technical equipment for totems Garage D'Agosport, Sion



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