Application of pattern recognition techniques to long-term earthquake prediction in central Costa Rica

Geophysical data consist of seismic tomography, Bouguer anomalies, seismic catalogue (RSN-ICE, 1984-1993) and seismic historical catalogue. Among the geological data, faults, lineaments, topography and a structural zonation of the region concerned have been used. Many other features have been obtained through the calculation of statistical functions of the original data such as nearness, density, length and b-value, other functions were secondary derivatives and modulus of horizontal gradient.