Aurora (IMAGE) U.S. Geological Survey Caption It is during geomagnetic storms that beautiful aurora borealis, or northern lights, are visible at high latitudes. However, geomagnetic storms can also cause risks to the power grid. Credit Joshua Strang, US Air Force Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.