Both the average daily sunspot numbers and solar flux were both higher for the week: Sunspot numbers up more than 3 points to 93.1 and the solar flux up by 8 points to 117.2. Geomagnetic activity was a bit lower -- with April 20 the most active day -- after a coronal hole on the Sun spewed a solar wind at high speed. The Australian government gave an alert one day prior. You can subscribe to th...
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