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2001

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/163317

On the characterisation of seismic signals generated by snow avalanches for monitoring purposes

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Recurs relacionat

https://doi.org/10.3189/172756401781819634

Resum

Seismic signals from artificially released avalanches were studied in an attempt to characterize them for avalanche-monitoring purposes. The seismic signals generated by different sizes and types of avalanches were recorded and analyzed in the time and frequency domains. Synchronized recordings of the corresponding seismic signals and the video images of the evolution of the avalanches were obtained together with a detailed cartography. Characteristic signatures in the frequency and time domains were found to depend on the characteristics of the avalanche path and measuring location, but to be mostly independent of avalanche size. The source of the different parts of the recorded seismic signals was determined. A relationship was observed between the avalanche size and the amplitude of the signals. Given the presence of local site effects, a prior seismic characterization of the avalanche path in relation to the recording sites is necessary for monitoring purposes. Moreover" it was found that sliding slabs in the early phase of acceleration produce little seismic energy, resulting in a time lapse between the observable start of the avalanche and the arrival of the detectable seismic waves at the receiving station.

Matèries

Allaus, Sismologia, Sismòmetres

Matèries (anglès)

Avalanches, Seismology, Seismometers

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Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

Citació

SURIÑACH CORNET, Emma, FURDADA I BELLAVISTA, Glòria, SABOT, F., BIESCAS GÓRRIZ, Berta, VILAPLANA, Joan manuel. On the characterisation of seismic signals generated by snow avalanches for monitoring purposes. _Annals of Glaciology_. 2001. Vol. 32, núm. 268-274. [consulta: 14 de gener de 2026]. ISSN: 0260-3055. [Disponible a: https://hdl.handle.net/2445/163317]

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