ARLA/CLUSTER: A 17 de Julho o numero de manchas solares foi, zero.Será que o maximo do Ciclo Solar acabou?

[João Costa > CT1FBF]

Sunspot number drops to zero

On July 17th, for the first time in nearly 3 years, the sunspot number
dropped to zero.

Is Solar Max finished?

Forecasts and further discussion of this "All Quiet" event highlight
today's edition of http://spaceweather.com
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