Item: Recent studies using infrasound sensors to remotely monitor avalanche activity
Title: Recent studies using infrasound sensors to remotely monitor avalanche activity
Proceedings: Proceedings of the 2004 International Snow Science Workshop, Jackson Hole, Wyoming
Authors: Robert H. Comey, Jackson Hole Mountain Resort and Bridger-Teton National Forest Avalanche Center, Tim Mendenhall, Inter-Mountain Laboratories, Inc., Sheridan, WY
Abstract: The ability to detect avalanches as they occur is essential for aggressive avalanche management in transportation corridors and is a fundamental ingredient of avalanche forecasting. Past studies have shown that moving avalanches emit a detectable sub-audible sound signature in the low frequency infrasonic spectrum. Experimental activities conducted in the Rocky Mountain West during the winter of 2002/2003 clarified the capabilities of single sensor infrasound avalanche monitoring systems. During the winter of 2003/2004 two projects were conducted in the Teton Range of Wyoming to research the use of multiple infrasound sensors to monitor avalanche activity. A distributed network of monitoring systems were deployed along the Twin Slides and Glory Bowl slide paths on Teton Pass to evaluate technology applicability in a highway setting. At the Jackson Hole Mountain Resort a distributed network of monitoring systems were deployed to research the potential for sensor array processing to improve upon single sensor processing capabilities. Research efforts related to these studies were funded through the following: National Oceanic and Atmospheric Administration Small Business Innovative Research Award, National Science Foundation Small Business Innovative Research Award, and a Wyoming Department of Transportation Research Award.
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Keywords: avalanche monitoring, avalanche detection, infrasound, sensor
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