Ambient Seismic Noise: A Continuous Source for the Dynamic Monitoring of Landslides

  • Yawar Hussain University of Brasilia (UnB) http://orcid.org/0000-0002-4155-6764
  • Hernan Martinez-Carvajal Faculty of Mines, National University of Colombia at Medellin, Medellin, Colombia
  • Cristobal Condori Instituto Geofísico del Perú, Ciencias de la Tierra Sólida CTS, Peru
  • Rogério Uagoda Post-Graduation Program in Geography, University of Brasilia, Brazil
  • Martín Cárdenas-Soto Engineering Faculty, National Autonomous University of Mexico,Mexico
  • André Luís Brasil Cavalcante Department of Civil and Environmental Engineering, University of Brasilia, Brazil,
  • Luciano Soares da Cunha Institute of Geosciences, University of Brasilia, Brazil
  • Salvatore Martino Department of Earth Sciences and Research Center for Geological Risks (CERI), University of Rome “Sapienza”, Roma, Italy

Resumo

Rainfall-induced variations in pore water pressures are the most common sources of significant disasters like landslides, dams’ failure, and other structural collapses. This study aimed at communicating preliminary results of seasonal monitoring of the Sobradinho landslide, Brasilia, Brazil, using ambient seismic noise. The noise was recorded before, during and after the rainy season with three L4-3A seismometers (2Hz) installed in a triangular array at the landslide mass. These records were processed using horizontal to vertical spectral ratio (HVSR) technique. As it resulted from the performed analyses, two frequency (ubiquitous (2Hz) and iniquitous (>2Hz)) peaks were observed over HVSR curves. The fluctuations in the secondary peak of HVSR curves are possibly related to the saturated soil properties of landslide mass in response to seasonal meteorological conditions. Experiments with a denser observation system are required to validate such a further behavior. The proposed method can be used for the monitoring of landslides as well as civil engineering structures like dams, bridges,and building.

 

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Publicado
2019-02-14
Como Citar
Hussain, Y., Martinez-Carvajal, H., Condori, C., Uagoda, R., Cárdenas-Soto, M., Cavalcante, A. L. B., da Cunha, L. S., & Martino, S. (2019). Ambient Seismic Noise: A Continuous Source for the Dynamic Monitoring of Landslides. Terrae Didatica, 15, e019012. https://doi.org/10.20396/td.v15i1.8652455
Seção
Breve Comunicação