Observations of the Anisotropies of Enhanced MeV Ion Fluxes at 85 AU

We report on the diffusive flow anisotropies observed in low-energy protons during intensity increases at Voyager 1 in 2001 and 2002. We propose that the unusual increased intensities after mid-2002 are due to particles accelerated by the solar wind termination shock or by the turbulent interface between the high-speed and low-speed solar wind flows. Fig. 1. (top) Three-day moving average intensity of 2-3 MeV protons at V1 and V2 vs. time. (bottom) Five-day moving average intensity of electrons and >70 MeV/nuc galactic cosmic rays at V1. pp. 3777–3780 c ©2003 by Universal Academy Press, Inc.