The internet number station community is agog with excitement tonight.
Alerted by emails that are doing the rounds, I can confirm that ther 4.625 'buzzer' frequency (see above) is currently carrying additional sounds best described as metallic clangs. They are sounding at approximately five and a half second intervals. The reports are coming in from many locations, so it's not a localised thing.
The clang is not in time with the buzzer, so may be an overlaid/superimposed signal emanating from elsewhere. It's a fascinating development, nonetheless.
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