Propagation path of the U.S. east-coast MW stations

   This figure shows the propagation path of the U.S east-coast MW stations that we caught at our eastern Hokkaido MW DXpedtion. You can see the propagation paths of KBRW-680kHz(Barrow, Alaska) and KOTZ-720kHz(Kotzebue, Alaska) are on the path of the U.S east-coast MW stations.

Click this figure to enlarge.

   These are audio clips of KBRW and KOTZ (presumed) that are recorded at the same hour when we caught the U.S.east-coast MW stations (WTPX and WBZ).
KOTZ(presumed) didn't say any ID and was playing music for a long time. I confirmed this station tends to play only music for a long time by its streaming radio on the Internet.

KBRW-680kHz at around 08:00UTC on Nov.25
You can hear "KBRW Silakkuagvic Communications Inc, Barrow, Alaska."


KOTZ(presumed)-720kHz at around 07:00UTC on Nov.25


   Both signals of the radio stations came in our MW DXpedition site very well.
Such wonderful receiving condition of KBRW seems to be rare here in Japan. I think these stations would be pilot stations to know the propagation condition for the U.S.east-cost MW radio stations.  What do you think?