Strongest Geomagnetic Storm in Three Months Hits Earth, Lasts Up to a Day

Image: Illustrative image · Dreerwin · CC BY 4.0 · Source

A severe geomagnetic storm of level G3 on the five-point scale has struck Earth, the strongest in three months, causing vivid auroras and potential disruptions in GPS and radio communication.

Earth is currently experiencing the strongest geomagnetic storm in three months, with disturbances reaching level G3 on the five-point scale, as reported by iXBT on October 10, 2026. The storm began around 20:00 Moscow time and is notable for its intensity, exceeding earlier forecasts which had predicted only a level G2 event.

This geomagnetic storm was triggered by clouds of solar plasma ejected during a surge in solar activity earlier in the week. When these plasma clouds interacted with Earth's magnetosphere, they caused a significant intensification of geomagnetic disturbances.

A G3-level storm is classified as strong and can result in a range of technological impacts. These include potential interference with satellite navigation systems, High Frequency (HF) radio communication, and certain power grid operations. Specifically, users may experience temporary declines in GPS accuracy and radio reception issues.

One of the most striking effects of this storm has been the appearance of intense auroras visible at latitudes of 50 degrees and above. Under favorable weather conditions and low light pollution, these northern lights have been observed even in parts of central Russia. The unusually wide geographic range of these auroras is attributed to the enhanced interaction between the solar plasma and Earth's magnetic field.

The last geomagnetic storm of comparable strength occurred on July 4, 2026. According to preliminary forecasts, the current geomagnetic disturbances may persist for approximately another 24 hours.

This event highlights the dynamic nature of space weather and its practical implications on modern technology infrastructure. Monitoring continues as authorities assess ongoing effects and communicate any necessary precautions to affected sectors.