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Date: Fri, 10 Nov 2006 11:28:06 +0100
From: =?ISO-8859-1?Q?Jean-Pierre_M=E9r=E9?= <jpm.f1afj@online.fr>
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Subject: Re: LF: Re: T/A , Kp = 6 !
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Thank you Alan for this explanation which clarifies my spirit ! (I am=20
young in the "LF" and I just start to correlate propagation T/A with the=20
solar activity)
73 qro Jean-Pierre f1afj

Alan Melia a =E9crit :
> Hi J, and Jean-Pierre, yes the Kp rose before midnight to 4 which seems=
 to
> have been enough to devastate the propagation across the Atlantic. Stev=
e
> Dove's plot of DCF39 shows about a 30dB lower level that the previous n=
ight.
>
> It is unusual for the electrons from a minor storm to enter the ionosph=
ere
> so quickly, but it is tied up with the plasma field direction. I guess =
from
> J's comments there was a bright auroral display last night and it would=
 seem
> a lot of electrons entered via the poles. More usually the electrons ar=
e
> "sucked up" into the magnetoshere tail and are then drawn back to the r=
ing
> current. They then take a day or so to enter the ionosphere.  The ring
> current "fill level"  is indicated by the Dst index and although the Kp
> recovers quick;ly, the Dst indicates how many electrons are available t=
o
> provide absorption over the next few nights. These are, I believe, tric=
kled
> into the ionosphere at the daylight edge were the solar wind pressure
> distorts the magnetosphere. The result is that although the Kp may be b=
ack
> to quiet tomorrow the poor conditions will probably last for upwards of=
 6 to
> 7 days.
>
> Cheers de Alan G3NYK
>
> ----- Original Message -----
> From: Jean-Pierre M=E9r=E9 <jpm.f1afj@online.fr>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: 10 November 2006 07:56
> Subject: LF: T/A , Kp =3D 6 !
>
>
> Ooopppsssss !
> Kp =3D 6     now !
>
> 73 f1afj
>
>
>
>
>
>
>  =20

--=20
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