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Solar activity

prefLabel	Solar Activity
definition	Any change in the sun's appearance or behavior. The sun's activity is described as being very low, low, moderate, high or very high. Solar activity changes over a period of, on average, 11 years. at solar maximum, the solar activity is high and so too the Extreme Ultraviolet (EUV) radiation output which affects the ionosphere. At solar minimum, the opposite is true.
topConceptOf	GCMD Sun-Earth Interactions
relatedMatch	Activity
narrower	Solar Flares Solar Velocity Fields Solar Imagery Cosmic Rays Solar Synoptic Maps Solar Ultraviolet Emissions Solar X-Ray Emissions Solar Oscillations Solar Prominences/Solar Filaments Coronal Mass Ejections Corona Holes Sunspots Solar Irradiance Solar Radio Wave Emissions Corona Solar Active Regions
inScheme	GCMD Sun-Earth Interactions
closeMatch	Solar activity
data publication(s) found by GCMD Science Keywords)	NOAA WDCA Magnetic Indices and Sunspots, 1932-1981Jun (DOI: https://rda.ucar.edu/datasets/ds832.0/) NGDC Sunspots and 10.7cm Flux, 1749-1992Jun (DOI: https://rda.ucar.edu/datasets/ds834.0/) Sacramento Peak 9.1 cm Solar Analyses (DOI: https://rda.ucar.edu/datasets/ds870.0/)