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20 january 2026, 12:43 мск

Geomagnetic indices have returned to levels close to G4.

Geomagnetic index Kp on January 20, 2025
Geomagnetic index Kp on January 20, 2025

Geomagnetic activity is currently experiencing a renewed increase. The planetary Kp index has returned to a level close to G4 and currently stands at G3.7. This surge is presumably the final one in the current event. After its conclusion, the geomagnetic storm should stabilize at G1-G3 levels by the end of the day.

The likelihood of reaching the highest level, G5, in the remaining time is estimated to be extremely low—no more than 5%. The central portions of the plasma cloud that approached Earth yesterday are believed to have largely bypassed the planet and are heading further toward the outer Solar System. Within 3-4 days, they will reach Jupiter, which, like Earth, is precisely on their trajectory. Tomorrow, the ejection front, along with the associated record-breaking radiation storm, will engulf Comet 3I/ATLAS, which is currently approximately halfway from Earth to Jupiter.

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Laboratory of Solar Astronomy,SRI RAS

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