Detection of avalanches using atmospheric infrasound

Long-range detection of avalanches may be feasible by detecting low-frequency acoustic waves generated by avalanche processes. A review of recent measurements of long-range atmospheric infrasound associated with avalanche activity indicates that unique acoustic signatures are launched by avalanches, perhaps providing a means of characterizing avalanche details at distances of hundreds of kilometers. This paper will review progress to date and indicate the form that an infrasonic avalanche detection system could take. The potential uses of a reliable detection system include avalanche forecast verification, comparisons with prediction models, and better definition of regional avalanche statistics.