domenica 20 novembre 2016

The K7RA Solar Update

Solar flux and sunspot numbers moved in opposite directions over the past week, and differences were more extreme than usual. Normally we expect daily sunspot numbers and solar flux to track together, and geomagnetic indices to track with each other as well, at least approximately. Average daily sunspot numbers over the past reporting week (November 10-16) rose ten points from 18.7 to 28.7, while average daily solar flux dropped from 76.9 to 45.8. These comparisons express differences from the previous reporting week, November 3-9. Over the same dates average planetary A i ndex increased markedly from 6.4 to 12.7, while the mid-latitude A index changed from 4.3 to 10.1.