GSE Equatorial plane mapping, using the Tsyganenko 89 model, of sites having detected the pulsations. The mapping of INU to approximately (−11, −13) RE is outside the region shown in the lower panel, but still inside the magnetopause. The normal range of plasmapause location in the dawn sector under quiet solar wind conditions is shown by a gray vertical bar centered near GSE X = 0, Y = −4. The inferred radially outward direction of motion of pulsation phase in this local time sector is shown by an arrow. Site locations in western Canada/USA are shown in the top panel.