Avalanche studies at Alpental

Glide avalanches and equipment installation

Downslope view of the rockface site; view to the east

Potential runout of large avalanche events threatens the groomed ski runs below rockface.


Spring, 2002; view to the east

A small part of the snowpack failed in spring, 2004. Compression along the right flank and a shallow snowpack likely prevented the entire slab from releasing. Glide rate was not collected during this event, although meteorlogical and seismic data collection was successful.


Glide crack below the upper rock step on
Rock Face, looking west.

The right flank (viewer's left) provides compressive support to the gliding snow, which may delay the release of the slope. The main area of compression is not visible in this photo.

 Composite photograph following a glide avalanche on 1/16/04. About 44.5 mm of rain was recorded prior to the avalanche. A small protion of the snowpack did not release, although snow did glide and avalanche over the intact snow.

Design drawings II

Post failure scenario at Rock Face.

The snow picket at the end of the cable transducer will release during failure. Otherwise, the transducer will be damaged.