Active region

active region

A space weather term to describe a localized, transient volume of the solar atmosphere in which plage, sunspots, faculae, solar flares, etc., may be observed. Active regions are the result of enhanced magnetic fields; they can have bipolar or multi-polar magnetic fields, and can be ephemeral to long-lived in nature.

Wikipedia, The Free Encyclopedia, 2018: Euler angles. Accessed 9 April 2018. Wikipedia, https://en.wikipedia.org/wiki/Euler_angles.

Term edited 13 August 2018.

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A space weather term to describe a localized, transient volume of the solar atmosphere in which plage, sunspots, faculae, solar flares, etc., may be observed. Active regions are the result of enhanced magnetic fields; they can have bipolar or multi-polar magnetic fields, and can be ephemeral to long-lived in nature.

1. A gaseous envelope gravitationally bound to a celestial body (e.g., a planet, its satellite, or a star).