Energetic proton (E p⩾ 50 keV) and magnetic field observations during crossings of the
Earth's Bow Shock by the IMP-7 and 8 spacecraft are incorporated in this work in order to
examine the effect of the Bow Shock on a pre-existing proton population under different
“interplanetary magnetic field-Bow Shock” configurations, as well as the conditions for the
presence of the Bow Shock associated energetic proton intensity enhancements. The
presented observations indicate that the dominant process for the efficient acceleration of …