Northern lights lit up most of Russia on Sunday after solar flares collided with Earths magnetic field and unleashed a strong geomagnetic storm.Known as aurora borealis, the dancing scarlet and green lights were visiblefrom Russia's Far East and Siberia, to the Ural mountains and North Caucasus.The rare night-time light show was also spotted in nearbyUkraine,Turkey,Kazakhstan andGeorgia, as well as parts of Europe and North America.Sunday's geomagnetic storm was caused by significantejections of the suns corona over the past week, according to the United States National Oceanic and Atmospheric Administrations (NOAA) Space Weather Prediction Center.Northern lights usually appear above the Arctic Circle, but the latest burst of sun particles was large enough to make the whispy ribbons of light visible further south.The charged particles crossed the 150-million-kilometer distance between the Sun and Earth a day earlier and with significantly greater force than forecasted,said the Russian Academy of Sciences laboratory of solar astronomy.As its now clear, both the speed and power of the ejection were estimated completely wrong, the RAS laboratory said.This still doesnt explain how such a weak cause was able to unleash a storm of this level.