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• In solar-terrestrial terms, an Active Prominence seen on the Disk.

  NOAA National Weather Service - Cite This Source - This Definition
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  Cite Definition for Active Dark Filament (ADF)

  American Psychological Association (APA)

  Active Dark Filament (ADF). (n.d.). National Weather Service Glossary. Retrieved March 28, 2023, from website: http://www.expertglossary.com/definition/active-dark-filament-adf.

  Chicago Manual of Style (CMS)

  Active Dark Filament (ADF). www.weather.gov. National Weather Service Glossary. NOAA National Weather Service. http://www.expertglossary.com/definition/active-dark-filament-adf (accessed: March 28, 2023).

  Modern Language Association (MLA)

  "Active Dark Filament (ADF)." National Weather Service Glossary. NOAA National Weather Service. 28 March. 2023 http://www.expertglossary.com/definition/active-dark-filament-adf.

• Browse Related Terms: Active Dark Filament (ADF), Active Prominence, Active Prominence Region (APR), AP Index, Auroral Oval, Central Meridian Passage (CMP), Continuum Storm (CTM), Differential Rotation, Disappearing Solar Filament (DSF), Eruptive Prominence on Limb (EPL), Flare, Gradual Commencement, High-Speed Stream, Limb, Magnetopause, Plagenil, Proton Event, Quiescent Prominence (Filament), Solar Coordinates, Solar Cycle, Solar Sector Boundary (SSB), SPOTNIL, Syzygy