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A comment on Coronal mass ejection impact imminent, Two more earth-directed CMEs. Parent comment

Re:Coronal mass ejection impact imminent, Two more earth-dir... by tithe on Friday May 10, 2024 @06:55PM (#40324529)
According to the SWPC[0], the "SPACE WEATHER CONDITIONS" section displays the pertinent information: as of 5/10/2024 at 6:00 CST, the "24-Hour Observed Maximums" list "R3 S2 G4". The "Latest Observed" section shows "R1 S1 G4".

According to NOAA Space Weather Scales [1], the effects of those events, their levels, and the corresponding hazards (including biological risks for the "S" category) are listed.

It is unclear to me what "high-flying" and "high latitudes" mean in these cases, and I would think that they would depend on the severity and location of the space weather event.

[0] https://www.swpc.noaa.gov/communities/space-weather-enthusia...

[1] https://www.swpc.noaa.gov/sites/default/files/images/NOAAsca...

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Re:Coronal mass ejection impact imminent, Two more earth-dir... by t0mas88 on Saturday May 11, 2024 @06:11AM (#40327207)
In general, not related to this event, anything over FL410 (roughly 41,000ft) and closer to the pole than 70 degrees latitude would be considered high altitude and high latitude in the aviation world.

Above FL410 is rare, except for business jets that can cruise that high. It comes with extra requirements on oxygen masks etc.

Polar routes are not that rare, but depend on certification how far away from a suitable airport you can go.

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