Frequency Content Evolution of Snow Avalanche Seismic Signals
Frequency Content Evolution of Snow Avalanche Seismic Signals
复制标题
雪崩地震信号的频率内容演化
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
E. Suriñach
中科院分区：
文献类型：
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作者：
B. Biescas;F. Dufour;G. Furdada;G. Khazaradze;E. Suriñach
自1998年以来，巴塞罗那大学雪崩研究小组在瑞士的西翁河谷实验场记录了雪崩产生的地震信号。在这些年中，不同规模和流量的雪崩被两个位于不同位置的传感器记录下来，本文给出了记录到的不同类型雪崩的地震信号运行谱的一般特征。使用这种方法，我们不仅能够检测具有低幅度信号的雪崩，而且能够在雪崩和其他震源之间进行识别（即，局部地震），具有相同的频率内容，但不同的频率演变。
Seismic signals generated by avalanches have been recorded by theavalanche team of the Universitat de Barcelona at theVallée de la Sionne experimental site (Switzerland) since 1998. During these years avalanches of varying size and flowwere recorded by two sensors located at different positions.In the present paper we show the general features of the running spectra of the seismicsignals for the different type of recorded avalanches. Using this method we are able not only to detect avalanches with low amplitude signals but also to distinguishbetween avalanches and other seismic sources (i.e., local earthquakes) which have thesame frequency content but a different frequency evolution.