Pulsating aurora flickers in quiet patches after big storms fade
After a substorm’s bright curtains fade, soft patches of aurora often remain — blinking on and off every few seconds like dim Morse code across the polar sky.
Scientists link the pulses to electrons raining in bursts from Earth’s radiation belts and magnetosphere. The patches can drift and reshape while staying far fainter than the main storm.
Not every aurora is a roaring curtain. Pulsating glow is the quiet afterparty — a flickering reminder that space weather keeps whispering even when the headline show is over.
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