GNGTS 2017 - 36° Convegno Nazionale

238 GNGTS 2017 S essione 2.1 We compiled the SARA catalogue before 1964 assembling, in a critical way, the available public material and some in progress national catalogues. The work was performed according to the following steps: • inventorying and critically compiling the available material; • selecting the most reliable parameters for each earthquake; • assessing a robust value of Mw for all events. While inventorying the material, some duplications have been removed. Data allowed to established the lower Mw threshold at 5 [-0.2] for the areas of the Andean; for Brazil, no lower threshold was established. Fig. 2 - Distribution of epicentres by class of Mw (Mw ≥ 5.0).