NASA NTRS · 19800010200
Spiral sunspots and solar activity forecasts
Abstract
The definition of a spiral sunspot is given. Three examples are described which illustrate the processes of the occurrence of spiral sunspots and the roles played by them in prominence and flare activities. A method for solar activity forecasts is then proposed making use of parameters such as spiral sunspots, prominences and neutral lines.
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You-Ji, D., Bai-Rong, Z.. 1979-08-01. Spiral sunspots and solar activity forecasts. https://ntrs.nasa.gov/citations/19800010200
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