Noaa: Ngdc: Sunspot Numbers Website

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Noaa: Ngdc: Sunspot Numbers

Curated by ACT

This brief article examines the historical work on sunspot recording by Rudolph Wolf. Also discusses how sunspot numbers are calculated today and provide graphs of sunspots numbers from past years.

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Additional Tags

annual sunspot number graph 1700-1995, cosmic rays, flare-associated events, how sunspot numbers are computed today, solar and planetary phenomena, solar cycles, solar minimum, solar publications, ngdc: sunspot numbers, rudolph wolf

Classroom Considerations

Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)

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