According to NOAA and independent monitoring services, on November 12, several coronal mass ejections (CMEs) triggered by a series of powerful solar flares on November 9–11 could hit Earth's magnetic field and cause a G1 to G4 storm, with the most likely peak on November 12.
What's happening?
The Sun experienced a series of X-class flares (including X1.7, X1.2, and larger) from November 9 to 11, ejecting coronal plasma clouds into space. When multiple CMEs follow each other or interact in interplanetary space, they can reinforce each other and create a stronger geomagnetic shock as they approach Earth. NOAA is warning of geomagnetic “watches” for November 11–13, with the potential for severe storms on November 12.
SpaceWeatherLive and other services predict that on November 12, conditional levels from G1 (weak) to G4 (strong/very strong) are possible, depending on the orientation of the interplanetary magnetic field (IMF) and the structural interaction of the emissions. In the case of a favorable (for the storm) orientation of the IMF, the effects will be stronger.
Ukrainian observation portals also report a high probability of an increase in the K-index — some forecasts mention a value of about 7 (K≈7), which corresponds to strong geomagnetic activity.
Possible consequences
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Interruptions in the operation of transformer substations and the power grid under local loads; risk of voltage fluctuations.
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Failures in high-frequency (HF) radio communications, navigation (GPS), as well as in the operation of some satellites (increased atmospheric drag, positioning errors).
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Increased likelihood of false signals in X-ray and radio equipment, problems with aviation and maritime navigation in some corridors.
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Increased chances of bright auroras - sometimes they become visible very far south of usual latitudes if the storm is strong.
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Increased sensitivity in weather-dependent people: headache, general deterioration of well-being, sleep disturbances (individual reactions).
Practical tips — how to prepare and minimize risks
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Follow updates from official sources (NOAA SWPC, local weather and energy services, air navigation services).
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If you are responsible for critical infrastructure or communication devices, prepare backup power sources, check the UPS and the tightness of the cables.
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For GPS users: understand that positioning accuracy may decrease; use additional/alternative systems for critical operations.
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People with cardiovascular diseases should have medication on hand, monitor their blood pressure; consult a doctor if necessary. Refrain from excessive consumption of coffee and alcohol.
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Of course, more rest, a drinking regimen, and a moderate diet won't hurt — this is useful for any state of increased weather sensitivity.
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For photographers and observers: on days of strong storms, there is a chance to see the northern lights; look for dark places with minimal artificial light and follow updates on polar activity.
Space weather forecasts have temporal uncertainty: the exact time and intensity of impact depend on the CME velocities, their interactions in space, and the orientation of the magnetic field at approach. Therefore, estimates may be adjusted in a "nowcast" mode with a narrow time interval (hours). Official updates — from SWPC/NOAA and national space/weather services — take priority.
