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There was a solar fireballs back in 1859. Telegraph systems failed. This article talks of a similar event back on March 12. It happened on the back side of the sun fortunately for humans.
https://www.americanthinker.com/articles/2023/03/dodging_the_apocalypse.html
There was a solar fireballs back in 1859. Telegraph systems failed. This article talks of a similar event back on March 12. It happened on the back side of the sun fortunately for humans.
https://www.americanthinker.com/articles/2023/03/dodging_the_apocalypse.html
On 2023/03/23 6:55 a.m., Dean Hoffman wrote:
There was a solar fireballs back in 1859. Telegraph systems failed. This article talks of a similar event back on March 12. It happened on the back side of the sun fortunately for humans.
https://www.americanthinker.com/articles/2023/03/dodging_the_apocalypse.html
According to the following report Earth has been struck by several solar
events larger than the Carrington Event relatively recently:
https://knowablemagazine.org/article/physical-world/2021/understanding-just-how-big-solar-flares-can-get
So, time to start making our electronics better protected against EMF
effects I assume.
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John\'s Jukes Ltd.
#7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
\"Old pinballers never die, they just flip out.\"
On Thursday, March 23, 2023 at 9:55:39?AM UTC-4, Dean Hoffman wrote:
There was a solar fireballs back in 1859. Telegraph systems failed. This article talks of a similar event back on March 12. It happened on the back side of the sun fortunately for humans.
https://www.americanthinker.com/articles/2023/03/dodging_the_apocalypse.html
We don\'t have telegraph lines anymore, so not to worry. That article is just more shock journalism based on fiction.
On Thursday, 23 March 2023 at 14:58:53 UTC, John Robertson wrote:
On 2023/03/23 6:55 a.m., Dean Hoffman wrote:
There was a solar fireballs back in 1859. Telegraph systems failed. This article talks of a similar event back on March 12. It happened on the back side of the sun fortunately for humans.
https://www.americanthinker.com/articles/2023/03/dodging_the_apocalypse.html
According to the following report Earth has been struck by several solar
events larger than the Carrington Event relatively recently:
https://knowablemagazine.org/article/physical-world/2021/understanding-just-how-big-solar-flares-can-get
So, time to start making our electronics better protected against EMF
effects I assume.
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John\'s Jukes Ltd.
#7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
\"Old pinballers never die, they just flip out.\"
The good news is that most communications now are over optical fibre. There could
be issues with the power circuits for repeaters on trans-ocean links, but these already
operate at many kV so it would need to be a huge induced voltage to make much difference.
Power distribution networks could be vulnerable, especially transformers which might
saturate with high levels of very low-frequency induced current. However, I
did read recently about work being done to harden power grids against such events.
John
On Thursday, March 23, 2023 at 9:55:39â¯AM UTC-4, Dean Hoffman wrote:
There was a solar fireballs back in 1859. Telegraph systems failed. This article talks of a similar event back on March 12. It happened on the back side of the sun fortunately for humans.
https://www.americanthinker.com/articles/2023/03/dodging_the_apocalypse.html
We don\'t have telegraph lines anymore, so not to worry. That article is just more shock journalism based on fiction.
On Thursday, March 23, 2023 at 9:55:39â¯AM UTC-4, Dean Hoffman wrote:
There was a solar fireballs back in 1859. Telegraph systems failed. This article talks of a similar event back on March 12. It happened on the back side of the sun fortunately for humans.
https://www.americanthinker.com/articles/2023/03/dodging_the_apocalypse.html
We don\'t have telegraph lines anymore, so not to worry. That article is just more shock journalism based on fiction.
All big power systems are 3-phase, with relatively small loop areas.
I suppose one could physically rotate the phases to minimize effective
loop area. I wonder if that\'s done.
On Thu, 23 Mar 2023 08:34:33 -0700, John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote:
All big power systems are 3-phase, with relatively small loop areas.
The question is, is the link wye (star) or delta connected.
During a Corrington event, the ground potential can be quote different
at different locations. If you install a wye connected HV between
station A and B and connect the respective star points to local
grounds, the star points will have a large voltage difference. At A
near DC current will flow from ground into star point A, through the
transformer A, through all three phase conductors to station B
transformer, into star point B and into ground at B. This near DC
current can saturate the transformers. The loop area can be big. The
use of auto transformers and/or three separate single phase
transformers (instead of a single three phase transformer) will worsen
the situation.
The use of delta connection (no ground) and three phase transformers
with common cores, the situation is not that bad.
I suppose one could physically rotate the phases to minimize effective
loop area. I wonder if that\'s done.
The phase connectors closest to the ground has the largest capacitance
against ground, to equalize this capacitance, phase conductors are
rotated.
On Thu, 23 Mar 2023 20:58:21 +0200, upsid...@downunder.com wrote:
On Thu, 23 Mar 2023 08:34:33 -0700, John Larkin
jla...@highlandSNIPMEtechnology.com> wrote:
All big power systems are 3-phase, with relatively small loop areas.
The Carrington hazard then becomes common-mode. I guess people already
have to protect against megavolt lightning strikes, with spark gaps or
something.
On Thursday, March 23, 2023 at 12:14:08?PM UTC-7, John Larkin wrote:
On Thu, 23 Mar 2023 20:58:21 +0200, upsid...@downunder.com wrote:
On Thu, 23 Mar 2023 08:34:33 -0700, John Larkin
jla...@highlandSNIPMEtechnology.com> wrote:
All big power systems are 3-phase, with relatively small loop areas.
The Carrington hazard then becomes common-mode. I guess people already
have to protect against megavolt lightning strikes, with spark gaps or
something.
Those gaps can break down and conduct wire-melting currents.
The currents are also induced in large-scale pipe systems. The Alaska
oil pipeline can expect a few kA of induced current through its welds.
On Thu, 23 Mar 2023 13:45:23 -0700 (PDT), whit3rd <whi...@gmail.com
wrote:
On Thursday, March 23, 2023 at 12:14:08?PM UTC-7, John Larkin wrote:
On Thu, 23 Mar 2023 20:58:21 +0200, upsid...@downunder.com wrote:
On Thu, 23 Mar 2023 08:34:33 -0700, John Larkin
jla...@highlandSNIPMEtechnology.com> wrote:
All big power systems are 3-phase, with relatively small loop areas.
The currents are also induced in large-scale pipe systems. The Alaska
oil pipeline can expect a few kA of induced current through its welds.
That\'s minor.
I\'d expect that a pipeline buried in the ground, or very close,
wouldn\'t develop much voltage to ground.
On Thursday, March 23, 2023 at 1:58:17?PM UTC-7, John Larkin wrote:
On Thu, 23 Mar 2023 13:45:23 -0700 (PDT), whit3rd <whi...@gmail.com
wrote:
On Thursday, March 23, 2023 at 12:14:08?PM UTC-7, John Larkin wrote:
On Thu, 23 Mar 2023 20:58:21 +0200, upsid...@downunder.com wrote:
On Thu, 23 Mar 2023 08:34:33 -0700, John Larkin
jla...@highlandSNIPMEtechnology.com> wrote:
All big power systems are 3-phase, with relatively small loop areas.
The currents are also induced in large-scale pipe systems. The Alaska
oil pipeline can expect a few kA of induced current through its welds.
That\'s minor.
I\'d expect that a pipeline buried in the ground, or very close,
wouldn\'t develop much voltage to ground.
Oh, permafrost is not conductive like the earth under your feet, but the oceans
of salt water are. The loop area is large.
On Thu, 23 Mar 2023 13:45:23 -0700 (PDT), whit3rd <whit3rd@gmail.com
wrote:
On Thursday, March 23, 2023 at 12:14:08?PM UTC-7, John Larkin wrote:
On Thu, 23 Mar 2023 20:58:21 +0200, upsid...@downunder.com wrote:
On Thu, 23 Mar 2023 08:34:33 -0700, John Larkin
jla...@highlandSNIPMEtechnology.com> wrote:
All big power systems are 3-phase, with relatively small loop areas.
The Carrington hazard then becomes common-mode. I guess people already
have to protect against megavolt lightning strikes, with spark gaps or
something.
Those gaps can break down and conduct wire-melting currents.
The currents are also induced in large-scale pipe systems. The Alaska
oil pipeline can expect a few kA of induced current through its welds.
That\'s minor.
I\'d expect that a pipeline buried in the ground, or very close,
wouldn\'t develop much voltage to ground.
What\'s the txline impedance of a 36\" pipe buried in the ground?
I wonder what the waveform of a solar magnetic event is like. There
must be scope shots online.