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Federal
Solar Features - Solar Flares
National Oceanic and Atmospheric Administration, Department of Commerce —
A solar flare is a short-lived sudden increase in the intensity of radiation emitted in the neighborhood of sunspots. For many years it was best monitored in the... -
Federal
Solar Geophysical Data (SGD) Reports (1955-2009)
National Oceanic and Atmospheric Administration, Department of Commerce —
Solar-Geophysical Data (SGD) reports were a comprehensive compilation of many different kinds of observational data of the sun's activity and its effects on the...