Weakening Trend in Solar Cycle Since SC21

SIDC+DailySunspotNumberSince1977

 

Meteorologist Paul Dorian
Perspecta, Inc.

Overview

The sun continues to be very quiet and it has been without sunspots this year 62% of the time as we approach what is likely to be one of the deepest solar minimums in a long, long time. In fact, all indications are that the upcoming solar minimum may be even quieter than the last one which was the deepest in nearly a century. In addition, there are now forecasts that the next solar cycle, #25, will be the weakest in more than 200 years. The current solar cycle, #24, has been the weakest with the fewest sunspots since solar cycle 14 peaked in February 1906. Solar cycle 24 continues a recent trend of weakening solar cycles which began with solar cycle 21 that peaked around 1980 and if the latest forecasts are correct, that trend will continue for at least another decade or so.

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