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Clayey landslide seismology : use of endogenous seismic catalog for understanding the deformation pattern

Abstract : This research project aims at increasing knowledge on the mechanisms controlling the deformation of clayey landslides through the combination of passive seismic and geodetic monitoring. Recent studies have demonstrated that seismic monitoring is able to give interesting information on landslide mechanics and in some case to provide precursory patterns useful for failure forecasting. The recent installation of seismometers on landslides revealed a variety of seismic signals of law magnitude (ML $<$ 1) suspected to be generated by slope deformation (falling, toppling, sliding, flowing), weathering of the slope material or fluid circulation. This endogenous seismicity needs to be categorized. We thus proposed a standard classification of the endogenous seismic sources; the objective of this standard is to be able to compare the seismic activity of several landslides and identify the mechanisms generating these seismic signals as well as their correlation with external forcing. Several signal properties (i.e. duration, spectral content and spectrogram shape) are taken into account to describe the different class of signals and allow generic comparison. We observe that similar signals recorded at different sites present the same properties and discussed the possible seismic sources considering the type of deformation observed on the studied slopes. [...]
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Submitted on : Wednesday, June 12, 2019 - 9:27:09 AM
Last modification on : Thursday, June 13, 2019 - 1:29:02 AM


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  • HAL Id : tel-02153181, version 1



Floriane Provost. Clayey landslide seismology : use of endogenous seismic catalog for understanding the deformation pattern. Earth Sciences. Université de Strasbourg, 2018. English. ⟨NNT : 2018STRAH014⟩. ⟨tel-02153181⟩



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