Hysteresis

From the photographer: “As the sun has already entered a Solar Minimum, chances of seeing aurora outburst decreased relatively, yet not an impossible encounter. This image was captured on 2019 March 4 during an auroral outburst that lasted for a complete night.”

Technical details: Single-exposure, Canon 6D, Sigma Art 20mm f1.4 used at f1.6, ISO-8000, 4s.