Fireflies and Aurora

A dream come true — fireflies flashing their yellow-green mating signals as a geomagnetic storm lights the sky with dancing magenta pillars.
This image is a blend of a single shot for the sky, taken at 1:53 a.m. as the aurora substorm peaked; plus a stack of images showing the cumulative bioluminescence emitted during five hours of firefly mating.

Sony a7iii
Sigma DC DN 16mm lens
f/1.6, ISO 1600, 10 seconds per frame

Foreground stacked in Sequator. Blended with single-frame sky in Photoshop.