The K7RA Solar Update

Solar activity was quiet over the past week, but geomagnetic numbers
were way, way up.

Average daily sunspot numbers dropped from 178.4 to 120, and average
daily solar flux from 223.7 to 175.7.

Average daily planetary A index rocketed from 7.9 to 35.7, and
middle latitude numbers from 11.1 to 23.4.

Six new sunspot groups emerged over the past week; one each on
September 13 and 14, two on September 16, and two each on September
17 and 18.

Predicted solar flux is 160 and 155 on September 20-21, 150 o ... Читать дальше »