Multi-spacecraft observations of the 15 February 2022 solar energetic particle event

The 15 February 2022 event is one of the largest solar energetic particle (SEP) events observed so far in Solar Cycle 25. This event was observed by a fortuitous configuration of spacecraft. Parker Solar Probe and BepiColombo were spatially close together when the eruption occurred and were near the radial direction of the apex of the parent CME while STEREO-A and Solar Orbiter were connected along nominal Parker spiral interplanetary magnetic field lines during this event. Energetic particles were observed from these and other spacecraft throughout the entire heliosphere from 0.35 AU to 1.5 AU. In this study, we use in-situ and remote sensing observations to provide an overview of this SEP event. We analyze and compare the pitch angle distributions, spectra, and the composition of particles from different spacecraft. In addition, we will investigate the solar release time of the particles, the associated radio observation, and the evolution of the CME-driven shock to explore the underlying mechanism behind such a widespread SEP event. This event highlights the importance of multi-spacecraft observations to advance our understanding of the acceleration and transport of SEPs in the heliosphere.