Re: VLF: strange propagation effects on VLF

[John Andrews <w1tag@charter.net>]

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