Seismic Hazard Maps for Colombia Using the New Generation of Attenuation Equations (NGA-2008)

Abstract

This paper presents seismic hazard maps of Colombia for a return period of 475 years. These maps are evaluated with probabilistic seismic hazard methodology, with a seismic catalog for 1960-2012, for which five equations of the 2008 Next Generation Attenuation Relation Project (NGA) were used. The NGA equations generate results with large variations, despite using the same relation scheme and the same PEER database, which was filtered depending on the criteria of each group. Additionally, standard deviations play an important role in the evaluation, because, in some cases, the value exceeds the average. Although we did not perform an analysis of completeness, the values obtained for the cities of Cali, Ibagué, Medellín, Pasto, Pereira, Popayán and Quibdó are greater than the current seismic standard