2002gl015160-cover.tiff ----------------------- Cover on GRL. Copyright issues, so you might want to avoid this. The figure shows the equatorial ring current proton distribution in the 50-60 keV range during the storm main phase of 4 October 2000, 18:00 UT, obtained by the High Energy Neutral Atom (HENA) imager on board the IMAGE spacecraft. The distribution was extracted from a raw Energetic Neutral Atom (ENA) image by applying a constrined linear inversion algorithm assuming a dipole magnetic field and pitch angle isotropy. The classical main phase ring current was believed to peak around dusk. This observation is consistent with ring current model results by R. A. Wolf et al. and M. -C. Fok et al. and confirms that the observed eastward skewing is an effect of the strong coupling between the partial ring current and the ionosphere via the region 2 current system that modifies the electric field in the magnetosphere. monocover.tiff -------------- Suggestion for AGU Monograph cover only. Not decided yet, so if you use it quick enough, there wont be any problems. Raw ENA image in the 27-60 keV range obtained by the IMAGE/HENA imager during the deep main phase of the 4 October 2000 storm. IMAGE was located at midlatitudes at around 8 Earth radii on the midnight meridian when this image was taken. The emissions extending to the nightside (closest to viewer) comes from the Earth's plasmasheet. The plasmasheet emissions represent the first global pitcure of the Earth's plasmasheet. The white lines represent the dipole field lines at L=4 and 8 at the local times of noon, dusk, midnight, and dawn. p3d.tiff -------- The equatorial proton distribution in the 10-200 keV range during the storm main phase of 4 October 2000, 18:00 UT, obtained by the High Energy Neutral Atom (HENA) imager on board the IMAGE spacecraft. The distribution was extracted from a raw Energetic Neutral Atom (ENA) image by applying a constrined linear inversion algorithm assuming a dipole magnetic field and pitch angle isotropy. The classical main phase ring current was believed to peak around dusk. This observation is consistent with ring current model results by R. A. Wolf et al. and M. -C. Fok et al. and confirms that the observed eastward skewing is an effect of the strong coupling between the partial ring current and the ionosphere via the region 2 current system that modifies the electric field in the magnetosphere. The white lines represent the electrical current intensity (on one isopressure contour) computed from the 3D pressure distribution. The current closes on itself in the equatorial plane, while at higher latitudes it can be seen connecting through the ionosphere.