Quoting "Tommyknocker" :

Speaking of the tropical bands, I haven't been able to get much on them
lately. I'm hearing a loud buzz all across the lower freqs, but I can't
seem to narrow down where it's coming from.

I hear that @#$% noise up here in Washington state too, and don't know what
it is. I'd love to know what it is - anybody know definitively what it is ?