From ARVic, original post here.

The International Amateur Radio Union Region 1 Monitoring System (IARUMS) has found many intruders on exclusive Amateur Radio allocations causing harmful interference.

In plague proportions are emissions from over-the-horizon (OTH) radars in China and Russia that affect 40m, 30m, 20m, and 15m.  The IARU Region 1 IARUMS newsletter for April also records voice traffic on several bands from fishing operations in various parts of the world, telemetry from marine buoys, and persistent taxi dispatching traffic from Russia on 10m.

Other interference from broadcasters includes both harmonics, and jamming activities to block out other broadcasts.  Military traffic is also occurring on our bands, some in digital format on 40m and 20m.

IARUMS Region 1 Coordinator Wolf Hadel, DK2OM said a Chinese OTH radar occupied considerable swaths of spectrum on several bands.