For the second time in as many weeks, a “severe” geomagnetic storm produced a dazzling northern lights show, on Thursday, for millions of stargazers in the United States and around the world. According to the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center,

Strong solar storm brought dazzling natural phenomenon to rare parts of the world late Thursday and early Friday, lighting up the night sky with vibrant tones of pink and green.

A severe geomagnetic storm could disrupt communications and bring northern lights to parts of California, according to a warning from the National Oceanic and Atmospheric Administration.