Continued G4 (Severe) Geomagnetic Storming Observed
swpc.noaa.gov
Continued G4 (Severe) Geomagnetic Storming Observed
1–10 of 87 posts
Re: Continued G4 (Severe) Geomagnetic Storming Observed
#2I am starting to think that someone at HAARP went rogue....
Re: Continued G4 (Severe) Geomagnetic Storming Observed
#3So what does this mean?
Re: Continued G4 (Severe) Geomagnetic Storming Observed
#4Meaning 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 propagation sporadic, satellite navigation degraded for hours, low-frequency radio navigation disrupted, and aurora has been seen as low as Alabama and northern California (typically 45° geomagnetic lat.)."
Apparently there are 100 of these per 11-year solar cycle.
Re: Continued G4 (Severe) Geomagnetic Storming Observed
#5So what does this mean?
The scale is explained here: http://www.swpc.noaa.gov/noaa-scales-explanation (click on "Geomagnetic storms")
Re: Continued G4 (Severe) Geomagnetic Storming Observed
#6So what does this mean?
Lots of photographers shooting the aurora as it creeps down in latitude.
Re: Continued G4 (Severe) Geomagnetic Storming Observed
#7Does anyone have any thoughts on any relationships between the recent solar flares and magnetic storms and the hurricanes and Mexican earthquake? Is this coincidence or does major space weather events result in major earth weather?
https://www.space.com/38057-sun-unleashes-decades-strongest-...
Re: Continued G4 (Severe) Geomagnetic Storming Observed
#8Re: Continued G4 (Severe) Geomagnetic Storming Observed
#9Checking 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 19:21 on 09.07.2017 through 02:00 on 09.08.2017 . A GMD warning of K7 or greater or greater is in effect for this period.
These are just warnings. No alarms or actions yet.
The effect of these events on the power grid is to induce DC currents between grounded points far apart. This reduces the capacity of some transformers by causing partial saturation. PJM monitors those currents at some substations, and will take action if transformers start to saturate. There are routine switching procedures for this.
For long-distance DC lines, it's a win; the system can use the power.
Re: Continued G4 (Severe) Geomagnetic Storming Observed
#10Does anyone have any thoughts on any relationships between the recent solar flares and magnetic storms and the hurricanes and Mexican earthquake? Is this coincidence or does major space weather events result in major earth weather? https://www.space.com/38057-sun-unleashes-decades-strongest-...
> There's no obvious pattern between solar activity and seismicity, so our results were inconclusive