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Mojave aurora

Chris Cook from Long Beach, California

The G4 geomagnetic storm of Jan 19/20 caused aurorae visible as far south as the Mojave Desert, as this photographer reported it was “faintly visible to the eye” from Joshua Tree National Park. He used a Canon DSLR to take a 30-second exposure at f/2.8 and ISO 3200. (Coincidentally, a magnitude 4.9