At 2330 UTC on July 24, Australia’s IPS Radio and Space services issued a geomagnetic disturbance warning. Increased geomagnetic activity is expected due to a coronal mass ejection. They predict quiet to unsettled conditions on July 25, active to minor storm on July 26, and active conditions on July 27.
As this bulletin nears release early Friday morning, the planetary A index was 4 on four rece…
American Radio Relay League | Ham Radio Association and Resources