Could Northern California see northern lights again? Here's what the latest forecast says
Briefly

The rare astronomical event, also known as the aurora borealis, may occur late Friday and into Saturday, as announced by the National Oceanic and Atmospheric Administration's Space Weather Prediction Center.
Auroras are caused by the sun's activity, with particles colliding with Earth's atmosphere, resulting in a mesmerizing light show typically forming 80 to 500 km above the Earth's surface.
Read at Sacramento Bee
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