Solar Cycle 23, how can we miss you if you won't go away?
Barely three months after forecasters announced the beginning of new Solar Cycle 24, old Solar Cycle 23 has returned. (Actually, it never left. Read on.)
"This week, three big sunspots appeared and they are all old cycle spots," says NASA solar physicist David Hathaway. "We know this because of their magnetic polarity."
"We have two solar cycles in progress at the same time. Solar Cycle 24 has begun (the first new-cycle spot appeared in January 2008), but Solar Cycle 23 has not ended."
Strange as it sounds, this is perfectly normal...
http://science.nasa.gov/headlines/y2008/28mar_oldcycle.htm?list757622