I also logged a wideband, 50 kHz wide digital buzz, with some fading, S3-S4 out of 5, around 0910 UTC the morning of November 24th, which was 0110 PST in my area of the NW US.
So it's apparently a repeat digital buzz operator. I heard it on my XHDATA D808 & 25 ft indoor wire.
The 40M band wasn't exactly hopping, so I had little propagation to compare the buzz to, although I did hear a couple weak LSB signals from Japan on 7120, 7147 and 7175, and the HHH Net was active with a few stations from probably the Midwest during the same time period.
The digital buzz was gone by 1031 UTC.