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Quantification of surface faulting potential in a low to moderate active region: An example from the Southern Rhinegraben area

  • Simon Loew
  • Jean-Pierre Jenni
  • Bernard Blanc
Article

Abstract

In low to moderate tectonically active areas, such as intracontinental regions with deep reaching zones of crustal weakness, direct observations of surface faulting offsets are very scarce and the seismic record is often incomplete and small. This complicates the study of a possible surface faulting hazard and requires new analysis concepts. In the case study presented in this paper, the seismic hazard potential of an already defined nuclear power plant site located in such a moderate active region had to be reassessed, and the possible effects of surface faulting had to be quantified.

Keywords

Slip Rate Investigation Area Critical Fault Rupture Length Border Fault 

Quantification de l'activité potentielle de failles de surface dans une région à activité tectonique faible ou moyenne: Exemple d'une zone située dans le sud du fossé rhénan

Résumé

Dans les secteurs à activité tectonique faible ou moyenne, telles que les régions intracontinentales avec des zones de faiblesse de la croûte très profonde, des observations directes des fracturations de surface sont très dispersées et les données sur la seismicité incomplètes. Ceci complique l'étude d'un éventuel risque dû à la fracturation de surface et nécessite d'utiliser de nouveaux concepts d'analyse. Dans l'exemple présenté dans cet article, le risque sismique lié à un site de centrale nucléaire déjà défini a dû être réexaminé et les effets éventuels d'une fracturation de surface ont été quantifiés.

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Copyright information

© International Association of Engineering Geology 1989

Authors and Affiliations

  • Simon Loew
    • 1
  • Jean-Pierre Jenni
    • 2
  • Bernard Blanc
    • 1
  1. 1.Colenco Inc.BadenSwitzerland
  2. 2.Holinger Inc.AarauSwitzerland

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