>------------ ORIGINAL MESSAGE ------------(may be snipped)
>
>On Sun, 28 Feb 2016 10:34:16 -0600, you wrote:
>
>>Looking at the 3830 scores, it seems like 10m favored the west coast and to a
>>lesser extent, the south and east. While there may have been plenty of 10m
>>RF flying OVER the midwest, almost none of it was arriving IN the midwest!
>>
>>73/jeff/ac0c
>
REPLY:
>
Quite normal. When 10 first opens with F-layer skip, the distance is
about 2500 miles, with a skip zone at lesser distances. This means the
east and west coasts can work each other but the midwest is open
mostly to areas out in the ocean, either Atlantic or Pacific. As
F-layer ionization increases, the skip gets shorter.
E-layer skip is different however. It typically opens at around 1500
miles, more or less, which gives the midwest a chance.
People sometimes refer to the "Black Hole of the Midwest" and this is
why.
73, Bill W6WRT
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