romad1, quick (hopefully) question. Are you familiar with the Soviet RADAR system OTH-B that was used during the cold war? Shortwave buffs have noticed a "woodpeckering" effect similar to the scanning that was used. The system has been offline since 1989. It seems to have come back to life in recent weeks on the 11 MHz band.
I'm not a shortwave buff but spent enough time in radio stations to know enough to be dangerous.
Anyway, a friend reposted a FB post by a Bruce Linder, who among other things is a HAM operator. He noticed the woodpecker effect about the time of the Russian invasion.
He's also referenced the proximities of the OTH-B transmitters to both Chernobyl and Zaphorizhahia nuclear complexes.
Interesting and scary stuff if you are into conspiracy theories.
https://www.facebook.com/macbruce