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bparsons 5 hours ago

There was a very large CME ten days ago. The NOAA scale had predicted a high likelihood of disruptions, and had specifically suggested that spacecraft and high altitude aircraft could be impacted.

https://www.swpc.noaa.gov/noaa-scales-explanation

https://kauai.ccmc.gsfc.nasa.gov/CMEscoreboard/prediction/de...

glaucon 3 hours ago | parent [-]

FWIW the "industry sources say" line on the incident is that it occurred on 30 October[1], so further back than ten days ago but of course there may have been other CME incidents at that time.

The European Agency Aviation Safety Agency [2] instruction describes the characteristics of the incident but not the date.

[1] https://www.theguardian.com/business/2025/nov/28/airbus-issu...

[2] https://ad.easa.europa.eu/ad/2025-0268-E