SPACESTORM is conducting extensive modelling of space weather events for post event analysis, and carrying out research to improve and verify the models against satellite data. It will generate a 30 year reconstructed dataset for MEO and determine the space radiation environment for a 1 in 100 year event, and model extreme event scenarios. It will increase knowledge on key physical processes underpinning radiation belt dynamics and improve the representation of physical processes in numerical models and reduce uncertainty.