Solar eruptive phenomena result in irregular processes in solar wind plasma and interplanetary magnetic field. Most high-speed streams, interplanetary shock waves, and other irregularities propagate to the heliosphere's edge non-independently from each other. One such mutual impact is the effective acceleration of charged particles at fronts of shock waves driven by the Coronal Mass Ejections (CMEs). In our study, we review a few fast-forward shock waves that affected differently the spectra, intensities, and species of energetic particles in the interplanetary space from January to May 2023. IP shocks were identified based on data from the Proton Alpha Sensor (PAS) of the Solar WindAnalyzer (SWA) and the Magnetometer (MAG). Simultaneously, we analyze some specific features in the effectivity of the charged particle acceleration for some selected phenomena mentioned using data and spectrograms of energetic particles observed by the Electron Proton Telescope (EPT), the SupraThermal Electrons and Protons (STEP), and the SupraThermal IonSpectrograph (SIS), of the EPD suite. We demonstrate that shock waves are not the only objects that influence the peculiarities in parameters of energetic particles in the heliosphere. The magnetic flux ropes, wave foreshocks, short- and long-duration magnetic holes, and other plasma structures should be considered from the point of view of affecting the spectral, temporal, and spatial parameters of energetic particles.This work is supported by the “Long-term program of support of the Ukrainian research teams at the Polish Academy of Sciences carried out in collaboration with the U.S. National Academy of Sciences with the financial support of external partners”.
