Ron Hardin wrote:

Ron Hardin wrote:

There was a pretty strong visible aurora in Central Ohio at 2-3am; at 5:30 the
AM band is wiped out, no WFAN 660 NYC in Central Ohio, not even any Cubans to
speak of. So N-S is wiped out too.

WFAN faded back in strong at 5:43am faded out again and now is back at 5:45

the fading cycle seems to continue.

It was definitely flat gone from 5:30 till now though.

The reflecting layer is always there, so it must be high absorption. I wonder
if it's D-layer like daytime, or some other mechanism higher up.

SO here's the question. There's some kind of absorption completely eliminating WFAN
from Central Ohio, at a time when it's normally loud like a local.

But at 05:42-05:46 WFAN surfaces twice, in a ``fade in,'' to tolerable levels;
for the rest of the time it's completely gone.

What can cause a fade in? Fade out is usual, and from competing paths. But
a fade in has to be disappearance of absorption, which somehow has to coordinate
over a wide area.

If it's D-layer, it would have some pretty long relaxation time, it seems to me.

audio of those surfacing 4 minutes http://rhhardin.home.mindspring.com/geostorm.ram
(before and after is pure noise, no signal)

--
Ron Hardin


On the internet, nobody knows you're a jerk.