RE: VLF: strange propagation effects on VLF

[Lubos OK2BVG <bvgbob@hotmail.com>]

Hello Stefan, LF!

In the enclosure is  part of the picture from my home SID station. The frequncy is 23,4kHz. The solar flare was C4,9 at 12:27UT and it is clerly seen on the diagram.

73!

Lubos, OK2BVG

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> Date: Wed, 3 Nov 2010 21:12:37 +0100
> From: schaefer@iup.uni-heidelberg.de
> To: rsgb_lf_group@blacksheep.org
> Subject: Re: VLF: strange propagation effects on VLF
>
> Wow, thanks John,
> I have seen the effect accidentally ;-)
> Interesting to see the time difference between Germany and the Israel
> Grabber by 4X1RF :-)
>
> 73, Stefan
>
> Am 03.11.2010 21:07, schrieb John Andrews:
> > Stefan,
> >
> > There was a C4-level solar flare at 1220 UTC from an active region
> > behind the Sun's limb. Others noted the event at VLF. See:
> > http://www.spaceweather.com/
> >
> > John, W1TAG
> >
> > On 11/3/2010 3:51 PM, Stefan Schäfer wrote:
> >> VLF,
> >>
> >> There are strange propagation effects going on on VLF in the last days.
> >> I just observed that there was a significant _sudden_ rise/enhancement
> >> of all the signal levels arround 12:15 UTC. This effect is observed on 3
> >> spectrograms, DF6NM's 4X1RF's(some minutes later) and DK7FC's grabber so
> >> it cannot be an accident. See the pictures.
> >> How can this be possible? It seems the autumn and winther period
> >> provides some interesting effects there which are not completely
> >> understood, at least by me ;-)
> >>
> >> 73, Stefan/DK7FC
> >>
>

=

23400Hz_101103_SID.JPG
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