Towards improving the seismic hazard map and the response spectrum for the state of RN/Brazil

Abstract Although Brazilian seismic activity is defined as low to moderate, it known that intraplate earthquakes can also be associated high intensities. In Brazil, the state of Rio Grande do Norte (RN) one most seismically active areas, but there no specific study evaluate hazard in this region. This paper presents analyses towards improving map, peak ground acceleration value and response spectrum RN. The methodology based on Probabilistic Seismic Hazard Analysis, comparing results design criteria code NBR 15421:2006 (Design resistant structures – Procedure). show that, general, sets conservative values for spectrum; however, related last one, shape quite different.