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Reminder, solar storm in effect. Look for auroras, and possible satellite, and power disruptions.
https://www.swpc.noaa.gov/news/g4-severe-watch-effect-12-novemberG4 (Severe) Watch in Effect for 12 November
published: Tuesday, November 11, 2025 23:39 UTC
G4 (Severe) Watch in Effect for 12 November
published: Tuesday, November 11, 2025 23:39 UTC
Geomagnetic Storm Watches in Effect, to include G4 (Severe) potential for 12 November
The current list of Watches include: 11 Nov G2 (Moderate); 12 Nov G4 (Severe); and 13 Nov G3 (Strong)
These Watches are in response to potential geomagnetic storm effects related to coronal mass ejections (CME) that have erupted from the Sun over the past several days
These events include CME activity from 9 November through the early morning of 12 November
The most recent CME occurred early on 11 Nov and is the most energetic and fastest of the CMEs
This CME was associated with an X5.1 solar flare (R3; Strong) that peaked at 1004 UTC (5:04 am EST) on 11 Nov
This CME is also associated with a moderate level solar radiation storm (S2) that is currently in progress
The forecast is tough due to this latest CME’s predominant ejecta aimed north and ahead of Earth’s orbit; additionally the previous CMEs are in the mix and anticipated to have some Earth-arrival influences prior to the 12 Nov CME arrival
Confidence in an Earth-component to the most recent CME is high, while timing has a moderate level of certainty
As always with these events, the intensity of the CME will not be know with better certainty until it arrives 1 million miles from Earth and is observed by the solar wind observatories at that location
It is at that point that any needed Warning decisions can be made by SWPC forecasters
So, for now, SWPC believes there is a potential for G4 levels upon CME arrival and/or as the CME passage progresses. Stay space weather aware and follow the latest information, forecasts, and updates at https://spaceweather.gov
image:
Previously posted in Science
https://www.democraticunderground.com/122894430
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