Auroras dazzled the sky farther south than normal. Here’s why [Video]

Another in a series of unusually strong solar storms hitting Earth produced stunning skies full of pinks, purples, greens and blues farther south than normal, including into parts of Germany, the United Kingdom, New England and New York City.There were no immediate reports of disruptions to power and communications.Related video above: Time-lapse captures stunning aurora in MassachusettsThe U.S. National Oceanic and Atmospheric Administration issued a severe geomagnetic storm alert on Wednesday after after an outburst from the sun was detected earlier in the week week. Such a storm increases the chance of auroras — also known as northern lights — and can temporarily disrupt power and radio signals.Video below: Northern lights put on dazzling display across MaineNOAA’s Friday forecast shows continued higher-than-normal activity, but the chances for another overnight show are slim farther south of Canada and the northern Plains states.What causes northern lights?The sun sends more than heat and …