The EEPAS (Every Earthquake a Precursor According to Scale) model is a method of long-range forecasting that uses the previous minor earthquakes in a catalog to forecast the major ones. It is based on the precursory scale increase (Ψ) phenomenon, which involves an increase in the magnitude and rate of occurrence of minor earthquakes close to the source region of a major event in preparation, including most recent major earthquakes in California (Evison and Rhoades 2002, 2004). The period of time occupied by the increase scales with magnitude, but it is on the order of 15 years for...

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