Average daily sunspot numbers changed from 160 to 129.3 and average
daily solar flux from 261.3 to 194.3. Geomagnetic numbers were
higher, with planetary A index rising from 21.4 to 39.3.
Seven new sunspot groups emerged this week, with two on October 10,
two on October 13, two more October 14 and one more on October 15.
Predicted solar flux is 170, 160, and 165 on October 18-20, 170 on
October 21-22…
Read more
American Radio Relay League | Ham Radio Association and Resources – Read More
More Stories
via the ARRL: A Century-Plus of Radio Innovation: The 102nd ARRL Handbook is Now Available
FCC Reminds EAS Participants to Transmit Accessible Emergency Alerts During 2026 Nationwide Test
Morse code link between Bridgwater and Canada recreated (UK)