A massive 500,000-mile coronal hole on the Sun is sending high-speed solar wind toward Earth, increasing the risk of geomagnetic storms that could disrupt satellites and power grids.
Over the past week, a pair of large coronal holes have been crossing the face of the Sun, looking a bit like the face of a cyclops turning its disgruntled gaze upon us. Despite their somewhat comical ...
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Earth's magnetic poles are shifting unpredictably, with rapid drifts and weakening fields raising questions about a possible future reversal and its global effects.