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Continued G4 (Severe) Geomagnetic Storming Observed

swpc.noaa.gov

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Re: Continued G4 (Severe) Geomagnetic Storming Observed

#71

Post by secabeen »

vel0city wrote: post #23
mrguyorama wrote: post #11

Earlier quoted context omitted.

How common are long-distance DC lines and what are they used for? My understanding is that the vast majority of power infrastructure is AC, and long distances are using High Voltage AC lines

I have not heard much about long-distance DC lines in the United States, where AC transmission lines are incredibly common. However, I have read long-distance DC transmission lines are becoming more popular with alternative energy sources in China, such as the Three Gorges Dam project. https://www.economist.com/blogs/graphicdetail/2017/01/daily-... https://en.wikipedia.org/wiki/HVDC_Three_Gorges_%E2%80%93_Gu...

The pacific DC intertie is a notable one here: https://en.wikipedia.org/wiki/Pacific_DC_Intertie

Re: Continued G4 (Severe) Geomagnetic Storming Observed

#73

Post by delegate »

xtreme wrote: post #49
delegate wrote: post #43

Earlier quoted context omitted.

Turns out, eclipses have everything to do with solar flares and every other phenomena you observe: You. All of these things happen to you . We've been trained to look at reality as something 'out there', but truth is that reality happens inside your consciousness and it's unclear where mind ends and 'reality' starts. It's unclear if there's anything but consciousness (note that the 'brain' might also be a construct o…

Reality exists independent of the observer. If there is some relationship between eclipses and hurricanes or between solar flares and seismic activity, they existed long before life originated on earth and would continue to exist far beyond our extinction. While we should not discount their possibility without some research, there is not much reason to believe there is such a connection without further evidence.

> Reality exists independent of the observer.

This is costing me way too much HN karma lol, I guess nobody likes to get down voted, but try rewording that first statement like this:

Observer exists independent of reality.

If that were true, what could be said about reality ? Who/what is this Observer, is it the same in every being ?

Is it possible to detach the observer from the self ? Yes. People have been doing this since there is history.

I guess that's the whole point I was trying to make.

Re: Continued G4 (Severe) Geomagnetic Storming Observed

#74

Post by japhyr »

I was going to ask if anyone knows whether these storms affect the accuracy of GPS systems. Then I found this:

> In calm conditions, single frequency GPS systems can provide position information with an accuracy of a meter or less. During a severe space weather storm, these errors can increase to tens of meters or more. Dual frequency GPS systems can provide position information accurate to a few centimeters. In this case the two different GPS signals are used to better characterize the ionosphere and remove its impact on the position calculation. But when the ionosphere becomes highly disturbed, the GPS receiver cannot lock on the satellite signal and position information becomes inaccurate. [0]

I'm going to try to figure out whether the navigation system on my boat has a dual frequency system or not. I'd hate to be "tens of meters" off when trying to navigate between submerged rocks, and there are lots of submerged rocks around here.

If anyone wants to share anything more about how these events affect the accuracy of GPS systems, I'd love to hear it.

[0] - http://www.swpc.noaa.gov/impacts/space-weather-and-gps-syste...

Re: Continued G4 (Severe) Geomagnetic Storming Observed

#75

Post by ruleabidinguser »

colanderman wrote: post #45
meseznik wrote: post #37

Earlier quoted context omitted.

Apparently there are 100 of these per 11-year solar cycle. Seems that there are much more than 100 flares each cycle: https://hesperia.gsfc.nasa.gov/hessidata/dbase/hessi_flare_l... It also seems that flares above X2.2 are quite rare. There have been only 10 of those since 2008: https://en.wikipedia.org/wiki/Solar_cycle_24#Events The latest flare, measured at X9.3 is VERY rare: https://www.spaceweatherlive.com/en/sol…

G4 geomagnetic storms, not flares.

Caused by a x2.2 flare

Re: Continued G4 (Severe) Geomagnetic Storming Observed

#76

Post by koyao »

colanderman wrote: post #4

Meaning of G4: http://www.swpc.noaa.gov/noaa-scales-explanation "Power systems: Possible widespread voltage control problems and some protective systems will mistakenly trip out key assets from the grid. Spacecraft operations: May experience surface charging and tracking problems, corrections may be needed for orientation problems. Other systems: Induced pipeline currents affect preventive measures, HF radio propagat…

"Yup, that's why I was late to work this morning." :)

Re: Continued G4 (Severe) Geomagnetic Storming Observed

#77

Post by basicplus2 »

mrguyorama wrote: post #11
Animats wrote: post #9

Checking the PJM power grid's alerts: Warning: A Geomagnetic Disturbance Warning has been issued for 01:47 on 09.08.2017 through 17:00 on 09.08.2017 . A GMD warning of K7 or greater is in effect for this period. Additional Comments: SpaceWeatherPredictionCenter Extended original Warning of GMD Intensity of K7 or greater until 9/8/17 21:00 UTC (17:00 EDT). Warning: A Geomagnetic Disturbance Warning has been issued for…

How common are long-distance DC lines and what are they used for? My understanding is that the vast majority of power infrastructure is AC, and long distances are using High Voltage AC lines

New Zealand has 350kv 1200kw dc link between north and south islands

https://en.wikipedia.org/wiki/HVDC_Inter-Island

Re: Continued G4 (Severe) Geomagnetic Storming Observed

#79

Post by dingo_bat »

dogma1138 wrote: post #68
dingo_bat wrote: post #55

Earlier quoted context omitted.

> Reality exists independent of the observer. Quantum mechanics would like a word with you.

Don't confuse localization with reality. You also seem to infer observer is some form of intelligence, in reality an observer or a measurement isn't anything more than a physical interaction.

I am talking about this type of experiments: http://newatlas.com/quantum-theory-reality-anu/37866/
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