|Reference : GEOPHYSICAL INVESTIGATIONS OF SEISMICALLY INDUCED SURFACE EFFECTS: CASE STUDY OF A LANDS...|
|Scientific journals : Article|
|Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography|
|GEOPHYSICAL INVESTIGATIONS OF SEISMICALLY INDUCED SURFACE EFFECTS: CASE STUDY OF A LANDSLIDE IN THE SUUSAMYR VALLEY, KYRGYZSTAN|
|Havenith, Hans-Balder [Université de Liège - ULg > Département de géologie > Géologie de l'environnement >]|
|Jongmans, D. [ > > ]|
|Abdrakhmatov, K. [ > > ]|
|Trefois, P. [ > > ]|
|Delvaux, D. [ > > ]|
|Torgoev, I. [ > > ]|
|Surveys in Geophysics|
|[en] Geophysical investigation ; landslide ; Suusamyr|
|[en] In summer 1998, a geophysical survey including seismic profiles and electrical tomography
has been carried out in the Suusamyr valley, Kyrgyzstan. The scope was to investigate surface
effects induced by the Ms = 7.3 Suusamyr earthquake, the 19th of August, 1992. In this paper,
special attention is paid to the case study of a debris slide triggered by the earthquake. Seismic data are analysed by P-wave refraction technique and by surface wave inversion. Electrical tomographic profiles are processed by 2D-inversion.
Using geotechnical and geological information, P-velocity models and resistivity sections are
interpreted in terms of geological materials, in order to build a geological 3D model. On the basis of the latter, we carried out static finite element computations as well as static and pseudo-static calculations with Janbu’s method. Newmark displacement was computed, considering or not the influence of the shallow soft deposits. The results are compared to the real displacement observed in the field and conclusions are drawn about the mechanism of the landslide.
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