Study of modern seismic zoning maps' accuracy (case for Eastern Uzbekistan)

Abstract

Influence of uncertainty factors of input parameters on results of the estimation of seismic hazard has been researched. It is found that the largest deviations, from seismic hazard maps designed on the basis of average values of distribution of seismic mode and seismic load parameters, may arise due to the imprecise depth of earthquake sources (H), uncertain estimations of seismic potential (Мmax) and slope of recurrence curve (γ). The contribution of such uncertainty factors, like imprecise definition of seismic activity А10, incorrect choice of prevailing type of a motion in the source, using regional laws of attenuation of seismic load intensity in distance instead of local once are substantially small. For Eastern Uzbekistan, it was designed the seismic hazard map with the highest value which takes into account every possible factors of uncertainty in parameters of seismic mode and seismic load.

Keywords

• Seismic hazard
• Seismic potential
• Seismic activity
• Seismic intensity
• Seismic zoning
• Seismic sources