As others have mentioned, the time of day may have effected reception of the 4625 kHz station. However, in general, I've noticed that there seems to be far few

As others have mentioned, the time of day may have effected reception of the 4625 kHz station. However, in general, I've noticed that there seems to be far fewer stations received on the shortwave band these days, compared to the 1980's when I listened to shortwave a lot as a kid. I think this is because I'm using a low-end receiver with its built-in telescopic antenna instead of a more sophisticated SWL setup with a proper antenna. Broadcasters such as the BBC World Service target specific geographies with their transmissions so they can be received on a low-end radio, and they no longer bother targeting developed regions such as North America with these transmissions. I'm guessing if I used the same radio somewhere like Africa, I'd be able to pick up a lot more stations.