English: Origin of Plasmas in the Earth's Neighborhood, 13. Energy flowing through geospace affects Earth on many time-scales. Top left: A mosaic from three orbits of an Air Force DMSP satellite shows auroral lights from above, a direct image of charged particle energy deposited into the upper atmosphere; dots of light reveal cities. Top right: Auroral lights photographed from below by the University of Alaska. Lower left: Diagram shows the extent to which geomagnetic storm currents in the ionosphere can induce currents in the windings of power station transformers; and a chart that suggests a correlation between high plains droughts and the 22-year solar cycle; a physical origin for such a relationship is not at all clear.