Noon ionospheric signatures of a sudden commencement following a solar wind pressure pulse

The CUTLASS SuperDARN radars are supported by the Particle Physics and Astronomy Research Council (PPARC) in the UK, the Swedish Institute of Space Physics, Uppsala, and the Finnish Meteorological Institute, Helsinki. The research at CETP was supported by Institut National des Sciences de l’Univers (INSU) in France. We thank R. Lepping and K. Ogilvie for providing respectively the Wind solar wind IMF and plasma data through the Coordinated Data Analysis Web (CDAWeb). We thank D. Hardy, F. Rich and P. Newell for the use of DMSP particle data. The IMAGE magnetometer data are provided through the Finnish Meteorological Institute, and the Hermanus magnetometer data are provided through the World Data Center for Geomagnetism in Kyoto.