Voyager 1 observations at the termination shock and in the heliosheath revealed new phenomena which required rethinking of some of our established paradigms. Very important among the new factors is the temporal and probably spatial variations which produce a number of effects which affect the energetic-particle spectra, anisotropies and their time variations observed at Voyager1.

The observations suggest strongly that the shock is blunt, was moving rapidly inward as it crossed Voyager 1 and that the flow was deflected significantly from radial flow. These shock motions and flow patterns are likely to be significantly non-steady and vary with both time and space. These properties have important conseqences for the acceleration and transport of energetic particles.

In addition, the observed magnetic field in the heliosheath exhibits large turbulent fluctuations quite different from those observed in the supersonic upstream solar wind. These magnetic fluctuations are interesing by themselves and also suggest the possibility of significant acceleration of energetic particles in the heliosheath by standard stochastic acceleration or diffusive compression acceleration.

The consequences ofthe shock motions, turbulent magnetic fluctuations and flow deflection, for the plasma and energetic particles, will be discussed.

Proceedings of the 30th International Cosmic Ray Conference; Rogelio Caballero, Juan Carlos D'Olivo, Gustavo Medina-Tanco, Lukas Nellen, Federico A. Sánchez, José F. Valdés-Galicia (eds.); Universidad Nacional Autónoma de México, Mexico City, Mexico, 2008; Vol. 1 (SH), pages 851-852