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From the photographer: “My edited music video of the superb all-sky aurora of April 23, shot from home in southern Alberta. Prospects for clear skies looked poor this night, so I did not venture to a scenic TWAN-worthy site for the show. But for auroras I’m concentrating not on scenic beauty but on trying to capture the weird and wonderful phenomena for science, such as the elusive transformation of a SAR arc into STEVE, or the newly named RAGDA — Red Arc with Green Diffuse Aurora. Alas, none of those sub-auroral phenomena showed up this night. But there were pulsating ribbons at the zenith that I had not seen before.”

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