Articles | Volume 22, issue 2
Research article
16 Feb 2022
Research article |  | 16 Feb 2022

Multi-method monitoring of rockfall activity along the classic route up Mont Blanc (4809 m a.s.l.) to encourage adaptation by mountaineers

Jacques Mourey, Pascal Lacroix, Pierre-Allain Duvillard, Guilhem Marsy, Marco Marcer, Emmanuel Malet, and Ludovic Ravanel

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Cited articles

Alpes Ingé: Couloir du Goûter, Suivi et analyse des chutes de blocs et de la fréquentation pendant l'été 2011, Rapport final, Fondation Petzl, 37 pp., 2012. 
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Dammeier, F., Moore, J., Haslinger, F., and Loew, S.: Characterization of alpine rockslides using statistical analysis of seismic signals, J. Geophys. Res., 116, F04024,, 2011. 
Debarbieux, B.: L'Unesco au mont Blanc, Chamonix, Guérin, France, (last access: 14 February 2022), 2020. 
DeRoin, N. and Mc Nutt, S.: Rockfalls at Augustino Volcano, Alaska: The influence of eruption precursors and seasonal factors on occurrence patterns 1997–2009, J. Volcanol. Geoth. Res., 211–212, 61–75,, 2012. 
Short summary
More frequent rockfalls in high alpine environments due to climate change are a growing threat to mountaineers. This hazard is particularly important on the classic route up Mont Blanc. Our results show that rockfalls are most frequent during snowmelt periods and the warmest hours of the day, and that mountaineers do not adapt to the local rockfall hazard when planning their ascent. Disseminating the knowledge acquired from our study caused management measures to be implemented for the route.
Final-revised paper