The microwave paramagnetic resonance hyperfine structures of 13-year Eu152 and 15-year Eu154 have been observed in a sample of Eu2+ which was incorporated in a KCl powder. From the number of his lines the spins were found to be I(Eu152)=3 and I(Eu154)=3. Neglecting hfs anomalies, from the ratios of the total hfs splitting these magnetic moment ratios were obtained: |μ(Eu154)||μ(Eu153)|=1.308+/-0.004, |μ(Eu152)||μ(Eu151)|=0.5574+/-0.006, |μ(Eu151)||μ(Eu153)|=2.264+/-0.006. Using μ(Eu153)≅1.6 nm, we find |μ(Eu154)|≅2.1 nm and |μ(Eu152)|≅2.0 nm. These results are discussed in relation to the nuclear shell model.