Is that 16:00 or 00:16?
https://www.swpc.noaa.gov/sites/default/files/styles/pad_sid...
2025-11-12T16Z
[1] https://www.spaceweatherlive.com/en/auroral-activity/auroral...
If you see the red line on this plot^, the interplanetary magnetic field, be more than -10 nanotesla for about 4 hours then there's a good chance of lower than normal latitude aurora. Negative means the magnetic field is pointing downwards out of the ecliptic plane of the solar system and this is the most energetically favorable orientation for reconnecting CME magnetic field lines with Earth's magnetic field lines and letting solar particles/energy in.
It can be 20nT positive (upwards) magnetic field with intense density and high velocity but still be a non-event aurora-wise just because energy is delivered to the Earth's ring currents at 10x slower rate than if it's pointing downwards.
None of the WSA-ENLIL or related predictive models take into consideration the magnetic field orientation of iCMEs because it's really hard to know from remote observations. They can be thought of as warnings to pay attention to the ACE L1 measurements.
abujazar•2h ago
onion2k•1h ago
SoftTalker•1h ago
onion2k•1h ago
dom96•1h ago
thebruce87m•1h ago
Most of the time when someone says they are in the “North East of the UK” it’s not some Scotsman up in Shetland it is an English person who is currently in the North East of England.
The North East of England is in the middle part of the UK mainland.
lukan•1h ago
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