Ground Motion Attenuation Uncertainties for Intraplate Earthquakes with an Application to Southern Finland.

• Main Authors: Pentti Varpasuo, Yrjö Nikkari, Pieter Van Gelder
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Canada; Fennoscandia
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.189.4265

ABSTRACT: The purpose of the present work is the estimation of seismic hazard in the territory of Finland in the possible area of the atomic power station in Olkiluoto. Because there are no registered acceleration recordings of earthquakes in Finland, the earthquake recordings from the Saguenay and Newcastle regions from Canada and Australia respectively were taken as sources of initial data because of their geological and tectonical similarity to Finland. Theoretical bases of determination of seismic hazard, questions of seismicity of the southern part of Finland, initial data on earthquakes and techniques of their processing, are considered in this paper. 1 INRODUCTION Finland is situated on the Baltic shield, which is the one of the seismically quietest areas in the world. The source mechanisms of earthquakes in Finland are considered to be the uplift of ground after glacial compression and tectonic plate movements. Earthquake recurrence rates in Fennoscandia are very low if compared with plate boundary regions