Poynting fluxes overplotted for the August 2011 magnetic storm. (a) Northern Hemisphere (NH) (left); (b) Southern Hemisphere (SH) (right); (c) NH Poynting flux integrated along the satellite track, with polar cap contribution (red), auroral zone contribution (blue), and total (black); (d) SH Poynting flux in same format as (c); (e) percentage of track-integrated Poynting flux in the polar cap in the NH; (f) SH percentage of track-integrated Poynting flux.