In situ data at L1. Top panel: intensity time profiles for solar energetic protons observed by ERNE aboard SOHO for energy channels ranging between 2.2 MeV and 68.0 MeV (labels correspond to the average energy of the channels). Lower panels, from top to bottom: solar wind speed, density, temperature, and the different components of the magnetic field from the Wind spacecraft. The vertical dotted red line shows the launch time of the Main CME from the Sun. Grey and green shaded areas correspond to the duration of the First and Main CMEs’ effects at Earth, respectively.