[time-nuts] Re: BOAT

[Michael Gindonis]

The burst (or effects) were observed 1320 UTC on the 9th. (First graph in
the Space weather article from the first mail
https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/
).  I found I needed to read the graph text carefully. On first look, I
thought I would check data around 2100 UTC.

I don't have much data logged, but had a quick look and saw nothing
significant on the 9th. Data I have logged is GPS satellite signal strength
(from a poorly located GPS module) NTP clock data from the GPS, 4G/LTE
modem logs.

Effects observed on Earth were VLF.

I used to log error data from my DSL modem, DSL lines make  a decent VLF
antenna... It could detect thunderstorms and other VLF interference.
Unfortunately, my ISP stopped providing DSL to my area last summer so I had
to move to 4G/LTE. In the absence of other interference, it may have been
observable in DSL error rates.

Here is an example from a thunderstorm a couple years ago.
https://twitter.com/mike011235/status/1278063691141992450

Best regards...

...Mike



On Sat, Oct 22, 2022 at 1:02 PM Bob kb8tq via time-nuts <
time-nuts at lists.febo.com> wrote:

> Hi
>
> My understanding is that the initial burst happened October 8 / 9 (
> depending on time zone)
> and that they have been looking at the “ramp down” on the burst ever
> since.
>
> Based on the chart on the Space Weather site ( and reproductions of the
> same data elsewhere),
> the initial burst was pretty impressive. It’s also the sort of thing that
> simply is impossible to
> put into a GPS broadcast propagation model. That’s what got me wondering
> if there had
> been some sort of effect.
>
> Indeed this would be a lot easier to dig into if the world in general
> caught word of it a bit
> sooner. Unfortunately, I only noticed an article about it well after the
> initial burst happened.
>
> Bob
>
> > On Oct 21, 2022, at 11:03 AM, David Taylor via time-nuts <
> time-nuts at lists.febo.com> wrote:
> >
> > On 21/10/2022 13:16, Bob kb8tq via time-nuts wrote:
> >> Hi
> >> Earlier this month a gamma event occurred that now has the name BOAT (
> Biggest Of All Time ).
> >>
> https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html
> <
> https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html
> >
> >> It did have a measured impact on propagation:
> >>
> https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/
> <
> https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/
> >
> >> The question is, did it impact GNSS systems and the delivery of time?
> Was there a “glitch”
> >> observed as a result? So far, I have not seen any mention of a timing (
> or a nav ) issue.
> >> Bob
> >
> > I recall seeing this mentioned at the time, but I didn't see any effects
> here in Edinburgh - at least according to what my u-blox MAX-M8Q-0-10
> reported.  I keep an eye on SNR and DOP:
> >
> >  https://www.satsignal.eu/mrtg/performance_gps_dop.php
> >
> > but with the event being a week ago only 2-hour average data now remains.
> >
> > The Phys.org site doesn't allow a cookie opt-out, which I don't like.
> >
> > The time is mentioned just as "early in the morning".  What time zone
> might that be?  UTC?  It gives a date of October 14.  Am I misreading that?
> >
> > The spaceweather site says October-09?  At least the time on the graph
> is in UTC.
> >
> > Two different events?
> >
> > Cheers,
> > David
> > --
> > SatSignal Software - Quality software for you
> > Web: https://www.satsignal.eu
> > Email: david-taylor at blueyonder.co.uk
> > Twitter: @gm8arv
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