The basic network has seen many variations since installation of the first protable station on July 19, 1985. Location and characteristics of seismic stations. 3 three components. Events that trigger the system are recorded with a digitizing rate of 100 Hz. Ten signals are also recorded continuously in parallel using smoked drum seismographs.
Seismic information is processedmanually.
The main purpose of seismic data is evaluating the volcanic activity, although regional and local tectonic earthquakes are also processed. Hypocentral location is carried out by means of the HYPO71 program. Important data is processed immediately, obtaining location and other characteristics usually in a few minutes. Regular data processing is done 24 hours per day so as to remain prepared for any emergency. Monthly brief reports evaluating volcanic and local seismic activity supporting local and regional emergency committees.