[REVISION HISTORY]

Solar eruptions and geomagnetic storm activity

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2026-10-09 18:56 UTC → 2026-10-10 09:43 UTC · added ~~removed~~

Solar activity from regions AR4545 and AR4549 has led to several M-class eruptions. These moderate-intensity explosions have caused radio communication disruptions in sunlit areas of Earth. ~~Forecasters from NASA~~ Following the observation of two coronal mass ejections (CMEs) on October 7 and 8, the NOAA ~~predict that~~ Space Weather Prediction Center has issued a ~~coronal mass ejection (CME) traveling at speeds of approximately 560 to 570 kilometers per second is expected to reach Earth. This event may trigger~~ warning for a ~~moderate~~ G2-class moderate geomagnetic ~~storm.~~ storm expected to impact Earth on Sunday, October 11, 2026. While initial forecasts predicted a weaker G1-class storm, updated data indicates a potential upgrade to G2 intensity. Scientists suggest that faster plasma flow from the October 8 ejection may catch up to and merge with the previous ejection before reaching Earth. An M6.7 class flare from active region 4549 on October 8 has already contributed to R2-level radio interference on the sunlit side of the planet. The actual impact of the storm will depend on the speed, density, and magnetic orientation of the solar wind as it interacts with Earth's magnetosphere. Potential technical disruptions include voltage oscillations in power grids, increased atmospheric drag on low-orbit satellites, and interference with GPS accuracy and high-frequency radio communications. The storm is also expected to enhance the visibility of the aurora borealis at high latitudes, including parts of the United States, Scandinavia, and the northern United Kingdom.

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