Résumé
From a macroseismic investigation of earthquakes ranging between 45 and 150 km in depth and magnitudes Mw >= 5.0 since year 2000, related to the South American-Atlantic (SAA) subduction in the region of the southeastern Caribbean STEP, we have determined that the cities of Ciudad Guayana and Ciudad Bol & iacute;var, sitting at the northernmost edge of competent rock outcrops of the Precambrian craton of Guyana, show seismic intensities which do not comply with a normal attenuation pattern of decreasing intensities with increasing distance. This necessarily leads to the revision of the current Venezuelan seismic-resistant code (COVENIN 1756-1:2019), since the seismic hazard estimations for this southern region of Venezuela appear to be clearly underestimated.