Detection of avalanches using atmospheric infrasound

TitleDetection of avalanches using atmospheric infrasound
Publication TypeConference Proceedings
Year of Conference1989
AuthorsBedard, Jr. A. J.
Conference Name57th Annual Western Snow Conference
Series TitleProceedings of the 57th Annual Western Snow Conference
Date PublishedApril 1989
PublisherWestern Snow Conference
Conference LocationFort Collins, Colorado
KeywordsAcoustic waves, Atmospheric infrasound, Avalanches

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.