Solar Activity
Researchers have uncovered evidence of a powerful solar proton event that struck Earth around 1200 ce by analyzing carbon-14 spikes in ancient Japanese trees and cross-referencing medieval records of red auroras.
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Scientists have achieved a milestone in solar observation by tracking an exceptionally active region on the Sun, NOAA 13664, almost continuously for 94 days using data from two spacecraft. This region, which emerged in April 2024, triggered the strongest geomagnetic storms since 2003 and caused widespread auroras. The extended monitoring reveals how complex magnetic fields drive solar storms with real-world impacts.
Solar activity surged over September 7-8, 2025, including an M1.2 solar flare. This follows a period of relative calm and could impact space weather. Observations were reported by solar experts.