Over the weekend, a small sunspot materialized in the sun's northern hemisphere, then, hours later, vanished again. Such an occurrence is hardly unusual during solar minimum when sunspots are naturally small and short-lived. However, this ephemeral spot was noteworthy because its magnetic field was reversed--marking it as a member of the next solar cycle.
Is this Solar Minimum over? Not even close, but this development does suggest that the start of Solar Cycle 25 is stirring.
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