Equatorwards Expansion of the Fast Solar Wind

Dorrian, G.1, Breen, A.1, Fallows, R.1, Bisi, M.2, Thomasson, P.3 and Wannberg, G.4

1 University of Wales, Aberystwyth, UK
2 University College, San Diego, USA
3 Joddrell Bank Observatory, UK
4 EISCAT Scientific Association, Kiruna, Sweden

We present results from Interplanetary Scintillation (IPS)observations made jointly with the EISCAT system in Scandinavia and the MERLIN system in the UK. These results provide evidence of a small but measureable equatorwards velocity component in the fast solar wind typically of the order of 1° - 2° off radial direction. Possible reasons for this expansion and further investigations are discussed.