Figure 2: Median values of electromagnetic power at small, medium and large scales for near-solstice and near-equinox periods in the noon-midnight local time meridian. Electromagnetic energy in northern and southern dayside (blue, red, respectively; left column) and nightside (black, pink, respectively; right column) passes are shown at three spatial scales. Band-pass filtering was done using the Savitzky-Golay filter, with small scales (top row, panels (a) and (b)) derived using time domain filters characteristic of 75 km along track scales; medium scales (middle row, panels (c) and (d)) characteristic of 200 km along track scales; and large scales (bottom row, panels (e) and (f)) characteristic of 350 km along track scales. Dashed lines connect the median values (marked with crosses), while the error bars show the lower and upper quartiles in terms of magnitude. The positions of the medians and error bars for different MLT and hemisphere sectors during the same time periods have been slightly shifted on the x-axis for visual effect and to enable the reader to better differentiate between the error bars. Note as explained in Methods that all electromagnetic power values are derived by integrating in time along the spacecraft world-line during an event, and dividing by the duration of the event.