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  • 1
    Electronic Resource
    Electronic Resource
    Geophysical Investigations Of Seismically Induced Surface Effects: Case Study Of A Landslide In The Suusamyr Valley, Kyrgyzstan (2000)
    Springer
    Surveys in geophysics 21 (2000), S. 351-370 
    Details
    ISSN: 1573-0956
    Keywords: landslide ; Suusamyr earthquake ; electrical tomography ; seismic profiles ; finite element modelling ; stability analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract In summer 1998, a geophysical survey including seismic profilesand electrical tomography has been carried out in the Suusamyr valley, Kyrgyzstan. The scope wasto investigate surface effects induced by the Ms = 7.3 Suusamyr earthquake, the 19th of August, 1992. Inthis 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 tomographicprofiles are processed by 2D-inversion. Using geotechnical and geological information, P-velocity modelsand resistivity sections are interpreted in terms of geological materials, in order to build a geological3D model. On the basis of the latter, we carried out static finite element computations as well as staticand pseudo-static calculations with Janbu’s method. Newmark displacement was computed, considering or notthe influence of the shallow soft deposits. The results are compared to the real displacementobserved in the field and conclusions are drawn about the mechanism of the landslide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006788808145
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    Paper (German National Licenses)
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  • 2
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    Probabilistic PGA and Arias Intensity maps of Kyrgyzstan (Central Asia) (2003)
    Springer
    Details
    Publication Date: 2003-01-01
    Description: New probabilistic seismic hazard and Arias Intensity maps have been developed for the territory of the Kyrgyz Republic and bordering regions. Data were mainly taken from the seismic catalogue of Kyrgyzstan and partly from the world seismic catalogue. On the base of seismicity and active tectonics, seismic zones were outlined over the area. For these, Gutenberg-Richter laws were defined using mainly instrumental data, but regarding also historical events. Attenuation of acceleration inside the target area could not be determined experimentally since existing strong motion data are insufficient. Therefore, empirical laws defined for other territories, principally Europe and China, were applied to the present hazard computations. Final maps were calculated with the SEISRISKIII program according to EUROCODE8 criteria, i.e. for a period of 50 years with 90% probability of non-exceedance. For longterm prediction, 100 years maps with 90% probability of non-exceedance have been developed. The procedure used for seismic hazard prediction in terms of PGA (Peak Ground Acceleration) was also applied to Arias intensities in order to be able to define regional seismogenic landslide hazard maps.
    Print ISSN: 1383-4649
    Electronic ISSN: 1573-157X
    Topics: Geosciences , Physics
    Published by Springer
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