Advertisement

Surveys in Geophysics

, Volume 24, Issue 5–6, pp 447–464 | Cite as

Frequency Content Evolution of Snow Avalanche Seismic Signals

  • Berta Biescas
  • François Dufour
  • Glória Furdada
  • Giorgi Khazaradze
  • Emma Suriñach
Article

Abstract

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.

running spectrum seismic record snow avalanche time-frequency analysis 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Amman, W. J.: 1999, 'A New Swiss Test-Site for Avalanche Experiments in the Vallée de la Sionne/Valais', Cold Regions Science and Technology 30(1–3), 1–11.Google Scholar
  2. Biescas, B., Dufour, F., Furdada, G., and Suriñach, E.: 2002, 'El espectrograma como herramienta para la detección sísmica de aludes de nieve (ejemplo de fuente móvil)', in Primer centenario del Observatorio de Cartuja. Cien años de Sismología en Granada [cd-rom], pp. 1–3.Google Scholar
  3. Chritin, V. and Rossi, R.: 1997, 'A l'écoute des avalanches', Neige et avalanches 78, 2–7.Google Scholar
  4. Issler, D.: 1999, '—Vallée de la Sionne (Switzerland)', in European Avalanche Test Sites. Overview and Analysis in View of Coordinated Experiments, Technical Report 59, Swiss Federal Institute of Snow and Avalanche Research, Davos, pp. 35–54.Google Scholar
  5. Lay, T. and Wallace, T.-C.: 1995, Modern Global Seismology, Academic Press, New York.Google Scholar
  6. Leprettre, B., Martin, N., Glangeaud, F., and Navarre, J. P.: 1998, 'Three-Component Signal Recognition Using Time, Time-Frequency, and Polarization Information Applications to Seismic Detection of Avalanches', IEEE Transactions on Signal Processing 46(1), 83–102.Google Scholar
  7. Nawab, S. H. and Quateri, T. F.: 1988, 'Short-Time Fourier Transform', in J. Lim and A. Oppenheim (eds.), Advanced Topics in Signal Processing, Prentice Hall, pp. 289–337.Google Scholar
  8. Nishimura, K. and Izumi, K.: 1997, 'Seismic Signals Induced by Snow Avalanche Flow', Natural Hazards 15(1), 89–100.Google Scholar
  9. Sabot, F., Naaim, M., Granada, F., Suriñach, E., Planet, P., and Furdada, G.: 1998, 'Study of Avalanche Dynamics by Seismic Methods, Image-Processing Techniques and Numerical Models', Annals of Glaciology 26, 319–323.Google Scholar
  10. Suriñach, E., Furdada, G., Sabot, F., Biescas, B., and Vilaplana, J. M.: 2001, 'On the Characterization of Seismic Signals Generated by Snow Avalanches for Monitoring Purposes', Annals of Glaciology 32, 268–274.Google Scholar
  11. Suriñach, E., Sabot, F., Furdada, G., and Vilaplana, J. M.: 2000, 'Study of Seismic Signals of Artifi-cially Released Snow Avalanches for Monitoring Purposes', Physics and Chemistry of the Earth 25(9), 721–727.Google Scholar

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Berta Biescas
    • 1
    • 2
  • François Dufour
    • 3
  • Glória Furdada
    • 1
    • 2
  • Giorgi Khazaradze
    • 1
    • 2
  • Emma Suriñach
    • 1
    • 2
  1. 1.Grup de Recerca de Riscos Naturals (RISKNAT)Spain
  2. 2.Dep. de Geodinámica i GeofísicaUniversitat de BarcelonaBarcelonaSpain
  3. 3.Institute Fédéral pour l'Etude de la Neige et des AvalanchesSionSwitzerland

Personalised recommendations