R-CRISIS: 35 years of continuous developments and improvements for probabilistic seismic hazard analysis

A new version of CRISIS, the program to perform probabilistic seismic hazard analysis (PSHA), has been released. This new version, called R-CRISIS v20, includes several additions and improvements with respect to previous ones, in the geometric, attenuation and seismicity models, besides having implemented a parallelized computational process that speeds up the computations up to five times, adding flexibility to the users to perform state-of-the-art PSHA and more complex and detailed analyses within reasonable computational times. These additions have been implemented with the objective of having better representations of the different components of a PSHA whilst preserving all the options that were available in previous versions of the program. R-CRISIS remains being a free and open-source program, two characteristics that combined with its flexible programming architecture provide room for future developments of this mature and widely used tool.