The IARU Region 1 Monitoring Service Newsletter for June 2022 is now available.
You can read about a new unknown signal on the 15m band.
It was present on 21.0035MHz for several days with long-lasting transmissions.
It was also received several times in the vicinity of 21.122MHz.
There were also several unknown signals on the 40 and 20m bands.
You can read the whole newsletter at on the IARU Region 1 website.