The Ryggfonn project. Avalanche data from the winters 1994/95 and 1995/96

Abstract

This report presents data collected from the full-scale Ryggfonn project during the winters 1994/95 and 1995/95. Only four avalanches were observed in the course of these two winters, three of which were naturally released and one artificially released. The present report describes briefly the weather characteristics of each winter season. The measurements obtained from the avalanche path include moment and shear strains caused by the avalanches on a steel tower, as well as the pressure on three load cells fixed to a concrete structure. In addition, the shear strain was measured on a steel mast erected on top of a 15 high dam. When possible, the avalanches have been classified according to the ICSI 1981 avalanche code and the deposit boundaries have been mapped.