| 1. | The frequency of geomagnetic storms increases and decreases with the sunspot cycle.
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| 2. | The number of particles rises and falls with the sun's sunspot cycle.
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| 3. | For instance, the sunspot cycle has an average period of < " 10.75-yr.
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| 4. | And maybe something about sunspot cycle factors into this, as well.
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| 5. | He is noted for his studies of sunspots and sunspot cycles.
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| 6. | Tau Ceti's sunspot cycle is 50 years, not 11 like Earth's.
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| 7. | The overall rate of Forbush decreases tends to follow the 11-year sunspot cycle.
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| 8. | "We don't know when the next big sunspot cycle is going to be.
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| 9. | Solar cycle 9 began in 1843, the year that Heinrich Schwabe discovered the sunspot cycle.
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| 10. | Studies link the drought to a sunspot cycle not due to end until the millennium.
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