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• (abbrev. ACTV). In solar-terrestrial terms, solar activity levels with at least one geophysical event or several larger radio events (10cm) per day (Class M Flares)

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  Cite Definition for Active

  American Psychological Association (APA)

  Active. (n.d.). National Weather Service Glossary. Retrieved March 28, 2023, from website: http://www.expertglossary.com/definition/active.

  Chicago Manual of Style (CMS)

  Active. www.weather.gov. National Weather Service Glossary. NOAA National Weather Service. http://www.expertglossary.com/definition/active (accessed: March 28, 2023).

  Modern Language Association (MLA)

  "Active." National Weather Service Glossary. NOAA National Weather Service. 28 March. 2023 http://www.expertglossary.com/definition/active.

• Browse Related Terms: Active, ACTV, Chromospheric Events, Eruptive, Filament Channel, Geophysical Events, High Energy Event, Proton, Quiet, Radio Event, Short Wave Fade (SWF), sudden ionospheric disturbance (SID), Type I, II, III, IV

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