Observations of a Solar Energetic Particle Eventon March 28th 2022 by the BepiColombo Satellite

On March 28, 2022, a particle flux increase was recorded at very different energies by the several particle instruments on board the BepiColombo (BC) spacecraft. Specifically, an increase in the low-energy ion flux was measured by the SERENA/PICAM instrument and one in both the proton (1.5 – 20.7 MeV) and electron (>0.5 MeV) flux was detected by the BERM radiation monitor. These observations are consistent with the occurrence of a Solar Energetic Particle (SEP) event. This study presents a comprehensive analysis of the observed SEP event, exploiting BC's unique vantage point to explore temporal, spatial, and energetic characteristics, as well as observations from other spacecraft in the inner heliosphere. In conjunction with BC's observations, we used data from the STEREO-A, which is very well magnetically connected with BC along the spiral magnetic field, and data provided by spacecraft positioned at the Lagrangian point L1, such as ACE and WIND, which are radially connected with BC. The findings provide insights into the physical mechanisms governing SEP events, offering a perspective on their solar origin, propagation, and evolution within the heliosphere.