Coronal rain is a phenomenon that occurs in the Sun's corona when hot plasma cools and condenses in strong magnetic fields and falls to the photosphere. It is usually associated with active regions, most obviously in the aftermath of a solar flare. Text archived. Retrieved 23 February 2026 Coronal rain can also form after injection of material via impulsive heating anywhere in the solar atmosphere, for example in association with magnetic reconnection.
The material that makes up the coronal rain can be up to hundreds of times cooler than the surrounding environment.
References
External links July 2012: Coronal Rain The Sun's Coronal Rain Puzzle Solved : Discovery News