I may have imaged one of those events eg, STEVE (strong thermal emission velocity enhancement); shown above in the middle of the frame. To the left is the typical northerly aurora, above that is the milky way, rearing up in the eastern sky.
What is STEVE?
From wiki:
STEVE (Strong Thermal Emission Velocity Enhancement) is an atmospheric optical phenomenon that appears as a purple and green light ribbon in the sky, named in late 2016 by aurora watchers from Alberta, Canada. According to analysis of satellite data from the European Space Agency's Swarm mission, STEVE is caused by a 25 km (16 mi) wide ribbon of hot plasma at an altitude of 450 km (280 mi), with a temperature of 3,000 °C (3,270 K; 5,430 °F) and flowing at a speed of 6 km/s (3.7 mi/s) (compared to 10 m/s (33 ft/s) outside the ribbon). The phenomenon is not rare, but had not previously been investigated. In August 2018, researchers determined that the phenomenon's skyglow was not associated with particle precipitation (electrons or ions) and, as a result, could be generated in the ionosphere.
This was taken on July 2, 2022.. the auroral bowl was beginning to boil in the north and I noted this ribbon or band in mid sky. This strange auroral band was imaged with a modified 60D Canon and a very wide Rokinon lens. (13 seconds, f 2.8, ISO 1600).
Why the burnt out and dead trees? A: The area that I was standing in is a pasture of very young regrowth coniferous trees (about 1 m to 2 m high), an area that was subjected to a fire about a decade ago.
STEVE usually appears as a ribbon of light at right angles to the main aurora. I think what is in the centre of the frame is STEVE.
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This kind of aurora is not posted too often (they are not rare, but ...they rarely get captured), so I am putting it up.
Thanks for looking, hope you enjoy it.
Member of the RASC
