Solar indicators rose over the past week, for both solar flux and sunspot numbers. The highest were on Tuesday, December 10 when the sunspot number was 169 and solar flux 175.2. In an otherwise quiet week the planetary A index reached 26 on Sunday, December 8, sparked by a strong solar wind surging from a coronal hole. We could see a repeat this weekend. Geomagnetic activity during the ARRL 10 ...
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