From: Rik Strobbe <rik.strobbe@kuleuven.be>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Thread-Topic: LF: HF Radio black out / also on VLF!
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Date: Wed, 6 Sep 2017 13:37:14 +0000
Message-ID: <1504705035099.18636@kuleuven.be>
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Subject: Re: LF: HF Radio black out / also on VLF!
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seems to be a X10 flare, it has been a while that we had such a strong flar=
e


73, Rik  ON7YD


________________________________
Van: owner-rsgb_lf_group@blacksheep.org <owner-rsgb_lf_group@blacksheep.org=
> namens Markus Vester <markusvester@aol.com>
Verzonden: woensdag 6 september 2017 14:59
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: HF Radio black out / also on VLF!

Another even stronger one at 12 UT:

http://services.swpc.noaa.gov/images/goes-xray-flux.gif

73, Markus (DF6NM)


-----Urspr=FCngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mi, 6. Sept 2017 11:56
Betreff: Re: LF: HF Radio black out / also on VLF!

Hi Roelof,

Very interesting. It also affects VLF! Clearly visible e.g. at http://www.i=
up.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
It happens since about 9 UTC.
Would have been interesting to observe the propagation on 8.27 kHz during t=
hat time...

73, Stefan

Am 06.09.2017 11:15, schrieb Roelof Bakker:

Hello all,

Now something different:

It looks like a severe radio black out of HF is ongoing.
I have never seen this before. See attachment.

This is also an opportunity to look at PLC interference at the lower
bands, which is normally covered by signals.

I checked it on 3 different antennas: mini-whip, loop and
hf-doublet.

73,
Roelof, pa0rdt
Middelburg, JO11tm


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     File:  HF Radio black out.jpg
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<p>seems to be a X10 flare, it&nbsp;has been a while that&nbsp;we had such =
a strong flare<br>
</p>
<p><br>
</p>
<p>73, Rik &nbsp;ON7YD<br>
</p>
<p><br>
</p>
<div style=3D"color: rgb(33, 33, 33);">
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>Van:</b> owner-rsgb_lf_group@bl=
acksheep.org &lt;owner-rsgb_lf_group@blacksheep.org&gt; namens Markus Veste=
r &lt;markusvester@aol.com&gt;<br>
<b>Verzonden:</b> woensdag 6 september 2017 14:59<br>
<b>Aan:</b> rsgb_lf_group@blacksheep.org<br>
<b>Onderwerp:</b> Re: LF: HF Radio black out / also on VLF!</font>
<div>&nbsp;</div>
</div>
<div>
<div style=3D"font-size:10pt; font-family:arial,helvetica,sans-serif; color=
:black">
<div style=3D"color:black; font-family:arial,helvetica,sans-serif; font-siz=
e:10pt">
Another even stronger one&nbsp;at 12 UT:<br>
<br>
http://services.swpc.noaa.gov/images/goes-xray-flux.gif<br>
<br>
73, Markus (DF6NM)<br>
<br>
<br>
-----Urspr=FCngliche Mitteilung----- <br>
Von: DK7FC &lt;selberdenken@posteo.de&gt;<br>
An: rsgb_lf_group &lt;rsgb_lf_group@blacksheep.org&gt;<br>
Verschickt: Mi, 6. Sept 2017 11:56<br>
Betreff: Re: LF: HF Radio black out / also on VLF!<br>
<br>
</div>
<div id=3D"AOLMsgPart_2_8ad16179-9ada-4fb9-9d0e-4687d80155e5">
<div class=3D"aolReplacedBody" bgcolor=3D"#ffffff">Hi Roelof, <br>
<br>
Very interesting. It also affects VLF! Clearly visible e.g. at <a class=3D"=
aolmail_moz-txt-link-freetext" href=3D"http://www.iup.uni-heidelberg.de/sch=
aefer_vlf/DK7FC_VLF_Grabber2.html" target=3D"_blank" rel=3D"noopener norefe=
rrer">
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html</a><b=
r>
It happens since about 9 UTC.<br>
Would have been interesting to observe the propagation on 8.27 kHz during t=
hat time...<br>
<br>
73, Stefan<br>
<br>
Am 06.09.2017 11:15, schrieb Roelof Bakker:
<blockquote>
<pre>Hello all,=0A=
=0A=
Now something different:=0A=
=0A=
It looks like a severe radio black out of HF is ongoing.=0A=
I have never seen this before. See attachment.=0A=
=0A=
This is also an opportunity to look at PLC interference at the lower =0A=
bands, which is normally covered by signals.=0A=
=0A=
I checked it on 3 different antennas: mini-whip, loop and =0A=
hf-doublet.=0A=
=0A=
73,=0A=
Roelof, pa0rdt=0A=
Middelburg, JO11tm=0A=
=0A=
  </pre>
<pre><fieldset class=3D"aolmail_mimeAttachmentHeader"></fieldset>=0A=
The following section of this message contains a file attachment=0A=
prepared for transmission using the Internet MIME message format.=0A=
If you are using Pegasus Mail, or any other MIME-compliant system,=0A=
you should be able to save it or view it from within your mailer.=0A=
If you cannot, please ask your system administrator for assistance.=0A=
=0A=
   ---- File information -----------=0A=
     File:  HF Radio black out.jpg=0A=
     Date:  6 Sep 2017, 11:07=0A=
     Size:  61486 bytes.=0A=
     Type:  JPEG-image=0A=
  </pre>
</blockquote>
</div>
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