Study of Seismic Signals of Artificially Released Snow Avalanches for Monitoring Purposes
نویسنده
چکیده
Seismic signals generated by artificially released avalanches were studied f’rom the seismological viewpoint in the time and frequency domains in an attempt to characterise them for monitoring purposes. The avalanches were artificially released and the corresponding seismic signals were recorded at different sites within a radius of up to 3 km together with the video images with a common time reference. The results obtained indicate that avalanches following the same path and recorded at the same site present similar seismic signals. A relationship between the avalanche seismic signals (amplitude, frequency content and wave trains) and the avalanche path was observed. The sources of the recorded seismic signals corresponds to avalanche path slope changes, interaction with obstacles and phenomena associated with the stopping stage of the avalanche. Local site effects were also present. These results lend support to the use of seismic signals as an efficient method of monitoring areas where avalanches are frequent and human observation is difficult.
منابع مشابه
Spanish avalanche research : experimental sites and seismic measurements Recherches espagnoles dans le domaine des avalanches : sites expérimentaux et mesures sismiques
Seismic signals generated by avalanches have been studied by the avalanche team of the Universitat de Barcelona since 1994. The aim of the study is to understand the avalanche seismic signals in relation to their sources to obtain information on the avalanche dynamics and hence use seismic measurements for monitoring purposes. To this end, experiments focused on improving the knowledge of seism...
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