G4 Severe Geomagnetic Storm

[jwt873]

The K index just hit 8 (2023-04-23-21:00 hrs resulting in a G4 (severe) Geomagnetic Storm: Planetary K-index | NOAA / NWS Space Weather Prediction Center

Results:

Power systems: Possible widespread voltage control problems and some protective systems will mistakenly trip out key assets from the grid.

HF Radio: HF radio communication blackout on most of the sunlit side of Earth for one to two hours. HF radio contact lost during this time.

Navigation: Outages of low-frequency navigation signals cause increased error in positioning for one to two hours. Minor disruptions of satellite navigation possible on the sunlit side of Earth.

Other systems: Induced pipeline currents affect preventive measures, 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.).

Should be result in some interesting HF conditions.. And perhaps some nice aurora displays for southern states.

 

[sprman1955]

Had blackout here in TN for a while and many signals hard to hear due to noise.

 

[n6hgg]

HF is non existent here on the usa west coast.

 

[IAmSixNine]

I read the title and was thinking G4 (unication)

 

[n6hgg]

It's slowly recovering but it's totally compromised propagation wise

 

[Boombox]

HF was thdddddt. MW sucked big time for even moderate DX.

 

[ind224]

I thought my HF antenna was disconnected just now....but I have the reported S6 of noise, yeah buddy.

 

[Boombox]

^^^^^ It gets that way sometimes. If you're a MW DXer sometimes after geomagnetic storms the auroral conditions allow reception of a lot of stations from southern latitudes. It's one of the few positives of this sort of thing. Doesn't always work out that great, though.