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Data rchart epresenting sunspots, geomagnetic storms, auroras.

Data rchart epresenting sunspots, geomagnetic storms, auroras.
Data rchart epresenting sunspots, geomagnetic storms, auroras.
Data rchart epresenting sunspots, geomagnetic storms, auroras.
Data rchart epresenting sunspots, geomagnetic storms, auroras.
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598456
Canavan, James J.
Data rchart epresenting sunspots, geomagnetic storms, auroras.
Illustration
01/01/2005
sunspot_plot2.jpg
Date is approximate.
Caption from Oceanus magazine, Vol. 44, No. 2, Pg. 9:
Studies of sunspots (yellow curve on chart), geomagnetic storms (red curve), and auroras (background image) show an 11-year cycle of waxing and waning solar activity that can be verified back to the Greek and Roman empires. (Data provided by Joe Allen, SCOSTEP.)
© Woods Hole Oceanographic Institution
© Woods Hole Oceanographic Institution
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