Overview

• The storm peaked at a Kp index of 7.33 (G3+) on September 30, the strongest event since June.
• Disturbances have persisted for more than 50 hours with conditions fluctuating between G1 and G3 after an earlier continuous stretch of storm-level activity.
• Solar-wind speeds remain exceptionally high at roughly 700–800 km/s with bursts near 900 km/s and plasma temperatures around 300,000 K, while a weaker interplanetary magnetic field has held levels near G1–G2 at times.
• IKI RAN reported a forecast exceeding a 50% probability of X-class flares for October 1, though activity has stayed in the M-class so far and scientists say improvement could appear within one to two days if no major eruptions occur.
• Researchers attribute the ongoing disturbance to heightened flare activity and Earth’s passage by a large coronal hole, with auroras reported from the Moscow region to northeastern Russia and potential impacts to radio, navigation, and power systems.