For the past 5+ hours the 25 meter band has been hit by broadband noise. This noise is very similar to what might be seen from an PRN or similar radar, but I have not seen such an application in HF before. I have no idea if this signal is unintentional or if it is intentional, I suspect intentional. What its purpose is again I do not know.
The signal is very wide, covering roughly 11250 to 11900 kHz, with it speak around 11610 kHz. It is not a local signal to me, it was first reported on the east coast at around 2150 UTC and at that time I could not detect it at all. As the evening progressed the signal started coming out of the noise for me. Around 0100 UTC it was strong enough to wipe out many broadcast stations in that band. At this time (0320 UTC) it is starting to fade, but still has significant strength.
The signal appears strongest on east coast (USA) remotes but can be detected on European remotes also.
At least twice the signal has paused for a short time, on the order of two to five seconds, once at 0023 UTC and once at 0303 UTC. I have no idea if it did this other times or not, I was not watching it the whole time, those are just the ones I noticed. During the pause the absence of signal makes the total width covered very obvious.
0023 UTC pause:
0303 UTC pause:
Hopefully it goes away soon, and does not become a regular fixture.