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Editor’s Note: On the evening of May 10, at 3:54 p.m. Arizona time, the National Weather Service observed conditions resulting from an extreme geomagnetic storm in outer space, in which electrons from space began flowing down Earth’s magnetic field, where they eventually collided with atoms and molecules in our upper atmosphere. Those collisions produced an aurora (streamers or arches of light) known as the northern lights — the scientific term is aurora borealis.
5 months ago