[SADXA] Interesting DX

[Darrel]

Correction:
    I looked at my VLF data at higher time resolution, and I *did* see 
an event possibly corresponding to the gamma-ray burst.

NWC, Australia: about 1 dB "glitch" down in strength at 1320 UTC.
JJI, Japan:  about 4 dB "glitch" downwards at 1320 UTC.

Nothing obvious on any of the other VLF stations I was monitoring.

My data, and data from other observers, are archived Stanford and can be 
plotted:

http://sid.stanford.edu/database-browser/browse.jsp?date=2022-10-09T13.00.00&display=vertical&goesFlareStrength=A1.0&timeRange=60&size=1000x200

My own data are labelled "Agua-Caliente 9471".  (I live near the Agua 
Caliente park in Tucson.)

Cheers,
        Darrel, aa7fv.

On 10/21/2022 11:30, Darrel wrote:
> I've been monitoring several VLF stations continuously for the last 
> few months. I looked at my data records for October 9 around 1300- 
> 1400 UTC.  This is a summary of what I received in Tucson:
>
> NWC 19.8 kHz, Australia: Strong signal, but nothing remarkable at that 
> time.
> NML  25.2 kHz, LaMoure North Dakota: Strong signal, nothing to note
> NAU 40.75 kHz, Puerto Rico: Weak signal, but very steady and nothing 
> remarkable
> JJI 22.2 kHz, Japan: Strong signal, nothing to note
> NLK 24.8 kHz, Jim Creek, Washington state: Strong signal. Possibly a 
> weak glitch around 13:20 UTC, but comparable to the noise fluctuations.
> NAA 24.0 kHz,  Cutler Maine: Strong signal, nothing to note
> NPM 21.4 kHz, Hawaii: Weak signal, but nothing to note.
>
> So, for what it's worth, I didn't notice any strong correspondence 
> with the gamma-ray burst on any of these VLF paths.
>
> Cheers,
>      Darrel, aa7fv.
>
> On 10/21/2022 10:37, Wes wrote:
>> Further on this.  If you look a the map in this article it's claimed 
>> that the propagation paths to the received VLF stations was enhanced 
>> by the gamma ray radiation and signals outside the footprint were not 
>> received.
>>
>> What intrigued me was the fact that AZ was on the edge of this 
>> footprint and this was about the time of our sunrise.  So I put the 
>> date and time in DX Atlas and opened a rectangular map.  Lo and 
>> behold, his gamma ray radiation footprint coincides almost completely 
>> with the solar nighttime footprint.  Coincidence?
>>
>> Wes
>>
>> On 10/21/2022 7:29 AM, Wes wrote:
>>> https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/ 
>>> ______________________________________________________________
>>> SADXA Website http://www.sadxa.org
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