The installation of the first equipments of the ground motion network started in June 1995 with different objectives. Mainly, to record adequately (without saturation) strongs motions, felt by population of the region. Also to carry out the study of the attenuation relationships of the acceleration with distance, the study of the amplification of soils in urban areas and to facilitate the studies of the seismic source for the big earthquakes between others aspects.
Site selection criteria
The main criteria used for site selection are following:
1) zones affected by big earthquakes at the past (the most active zones with seismic zones); ,
2) zones with moderate seismic activity highly populated and/or dangerous industries;
3) sites on different materials, soil and rock, to analyse the amplification of the ground motion.
