A powerful burst of solar activity is expected to trigger a rare 'severe' geomagnetic storm, with forecasters warning that the resulting northern lights could be visible across as many as 23 US states this week.
Space weather experts say the incoming disturbance, driven by a coronal mass ejection (CME) from the Sun, may push auroral activity far beyond its usual polar limits, creating a rare opportunity for skywatchers across large parts of the United States to witness the phenomenon.
