EARTHQUAKE HAZARD FOR ROERMOND, THE NETHERLANDS

The frequency-intensity and the frequency-magnitude relations are calc ulated from the observed tectonic earthquakes in the Netherlands. The obtained mean return periods for an intensity VII and a magnitude 5.8- 5.9, like the 1992 Roermond earthquake, are estimated to be 132 years and 1000 years or more respectively. The influence of the recent Roerm ond earthquake on the existing seismic hazard intensity maps for the N etherlands is negligible. The earthquake hazard for the town of Roermo nd is evaluated.