SpaceWeather.com reports that on Nov. 6, the Earth crosses a part of interplanetary space separating regions of opposite magnetic polarity. This "solar sector boundary crossing" could trigger geomagnetic activity around Earth's poles. This could mean bright northern lights, visible farther south than normal if skies are clear. Then, the next day, a high-speed solar wind stream will blow across the planet. "NOAA forecasters say there is a 45 percent chance of G1-class geomagnetic storms on Nov. 7 [and Nov. 8] when the emerging wind reaches Earth. That means faint auroras, or northern lights, may be seen in the northernmost United States.