dark surge on the disk

Alternative definitions (0), class: vernacular (0)
Term: dark surge on the disk

Dark gaseous ejections on the Sun visible in Ha. They usually originate from small subflare-like brightenings. Material is usually seen to be ejected, then decelerate at a gravitational rate, and to flow back to the point of origin. DSDs can occur intermittently for days from an active region.

Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan