You're looking at one of the rarest things ever photographed from space.
A red sprite — a 50-mile-tall electrical discharge that fires upward out of a thunderstorm into the edge of space. It exists for milliseconds. Nitrogen molecules in the mesosphere glow pink for a fraction of a heartbeat, then it's gone.
NASA astronaut Nichole Ayers caught this one from the ISS, over Mexico and the US.
Lightning we know. This is something else.