Tad Cook, K7RA, Seattle, reports: The 10.7-centimeter solar flux density was 88.1 on Wednesday, November 4, the highest since October 14, 2016, when it was 92.8. The average daily solar flux for that week as reported in this bulletin was 76.9, and average daily sunspot number was 18.7, so activity 4 years ago was similar to recent activity; in fact those numbers closely match the flux and SSN i...
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