The source of interplanetary Jovian MeV electron enhancements observed at Earth is found to be Jupiter's magnetotail. If an average solar wind speed of 400 km sec-1 is assumed, the main region of emission extends from ~1.0 AU downstream from Jupiter to ~2.0 AU beyond the planet. (If a value of 350 km sec-1 is assumed, it extends from ~0.4 AU to ~1.2 AU.) Individual ''active'' zones are ~0.2 AU in length. It is proposed that interplanetary magnetic field line connection with the tail is the mechanism providing the Jovian electrons observed at Earth.