The Solar Electron and Proton Telescope (SEPT), part of the IMPACT investigation onboard STEREO, is designed to measure energetic electrons from 30 to 400 keV and protons from 60 to 7000 keV. After successful commissioning, SEPT started its scientific observations in mid December 2006. From January through April 2007, the solar activity was very low. Under these extremely quiet conditions, the enhancements of energetic proton fluxes are characterized by series of low energy ( < 1 MeV) bursts originating in the Earth magnetosphere or the bow shock (upstream events) and by recurrent, several days long enhancements associated with corotating interaction regions (CIRs). The frequency of upstream events decays with increasing distance to the bow shock with an e-folding distance of 350 RE. During the observed epoch, three different high speed solar wind streams originating in coronal holes were present producing a recurrent series of energetic proton events. Energy spectra and multi-spacecraft observations of intensity-time profiles during the events are discussed which show delays inconsistent with a co-rotation scenario.