The dataset presneted here are used in "The Mother’s Day solar storm of 11 May 2024 and its effect onEarth’s radiation belts." EPT files (ept_protons_x and ept_electrons_x) contain the differential flux observed by the energetic particle telescope (EPT) averaged in L-time bins (0.25L - 6 hours) from May 1st 2024 to June 30th 2024, where L is the McIlwain parameter. This averages are performed for each energy chanel of the EPT (6 for electrons and 10 for protons). Differential fluxes are given in [(s cm² sr MeV)^-1]. Similar to the EPT files, the POES files contain electrons and proton fluxes from the MEPED instrument on board MetOp3 averaged on the same grid as the EPT fluxes. In this case proton fluxes are differential fluxes in units of [(s cm² sr keV)^-1] whereas electron fluxes are integral fluxes in units of [(s cm² sr)^-1]. GOES file contains the integral proton fluxes observed by GOES from May 1st to June 30th 2024. Proton fluxes are given in [(s cm²)^-1]. The nmdb file contains the count rates from ground based neutron monitors retrieved from the neutron monitor database. Note that PROBA-V/EPT data are publicly available on the Space Situational Awareness website of ESA https://swe.ssa.esa.int/space-radiation. POES data are available on https://satdat.ngdc.noaa.gov/sem/poes/data. GOES on https://www.swpc.noaa.gov/products/goes-proton-flux and OMNI on https://omniweb.gsfc.nasa.gov/html/ow_data.html