The debate has been going back and forth for a few years about how powerful or how mild the next solar cycle will be. Now NASA is saying that the upcoming cycle will likely be one of quietest in regards to the number of sunspots:
An international panel of experts led by NOAA and sponsored by NASA has released a new prediction for the next solar cycle. Solar Cycle 24 will peak, they say, in May 2013 with a below-average number of sunspots.
“If our prediction is correct, Solar Cycle 24 will have a peak sunspot number of 90, the lowest of any cycle since 1928 when Solar Cycle 16 peaked at 78,” says panel chairman Doug Biesecker of the NOAA Space Weather Prediction Center.
It is tempting to describe such a cycle as “weak” or “mild,” but that could give the wrong impression.
“Even a below-average cycle is capable of producing severe space weather,” points out Biesecker. “The great geomagnetic storm of 1859, for instance, occurred during a solar cycle of about the same size we’re predicting for 2013.”
The 1859 storm–known as the “Carrington Event” after astronomer Richard Carrington who witnessed the instigating solar flare–electrified transmission cables, set fires in telegraph offices, and produced Northern Lights so bright that people could read newspapers by their red and green glow.