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SWPC issues first G4 geomagnetic storm watch since 2005

swpc.noaa.gov

31–33 of 33 posts

Re: SWPC issues first G4 geomagnetic storm watch since 2005

#31
post #19

Earlier quoted context omitted.

I just went a took a look, seems like I could see sunspots around the 3oclock position.

Just verified I can see also, Central US. Wow that's huge to be visible from earth with no magnification.

I just stepped out and can offer another anecdotal verification here. This is about as prominent as a transit of Venus. It's really something!

Re: SWPC issues first G4 geomagnetic storm watch since 2005

#33
post #8
post #6

I am confused by the slide, which mentions in the first bullet point that this is the first "G4" since 2005, but in the last bullet point says there was one in March.

It’s the first G4 watch, but not the first G4 event. In other words, the prior G4 event was not predicted. It can happen that an event is more significant when it arrives than what was predicted, which is what happened here.

A G4 storm was forecast yesterday, but guess what—a G5 was observed: https://www.spaceweather.gov/news/g5-conditions-observed. As with G4 before, not predicted.
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