SOLAR TOPICS A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site active region Credit: A. Title (Stanford Lockheed Institute), TRACE, NASA A localized volume of the Sun's outer atmosphere where powerful magnetic fields, emerging from subsurface layers, give rise to various short-lived features. These features may include: sunspots and faculae in the photosphere plages, fibrils, and filaments in the chromosphere coronal condensations in the corona. Solar flares are also associated with active regions. Related category    • SOLAR TOPICS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP