Tad Cook, K7RA, in Seattle, Washington, reports: Last Thursday, July 17, there were no sunspots at all, a sobering reminder of how weak this solar cycle is. We have to go way back to August 14, 2011, to find the last “spotless” day; the Sun exhibited no spots on January 27, 2011, as well.
On July 18 two new sunspot regions emerged, but the sunspot number was only 26. Two days later, on Sunday, J...
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On July 18 two new sunspot regions emerged, but the sunspot number was only 26. Two days later, on Sunday, J...
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