light bridge

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Term: light bridge

Observed in white light, a bright tongue or streaks penetrating or crossing sunspot umbrae. Light bridges typically develop slowly and have lifetimes of several days. The appearance of a light bridge is frequently a sign of impending active region division or dissolution. The more brilliant forms occur with overlying bright plage and often occur during the most active phase of the sunspot group.

Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan