2025-09-16
Historical snapshot — data recorded on 2026-08-12, not live
Space weather — 2025-09-16
Daily Statistics Brief
On 2025-09-16, the planetary Kp index peaked at 4.4 (G1 minor). solar wind speed reached 438 km/s and Bz dipped to -6 nT. Auroral hemispheric power was 44 GW. The Dst index reached -66 nT.
Aurora Oval — Peak Kp 4.4
Unsettled — aurora confined to high latitudes.
Auroral power: 44 GW
Kp max4.4Kp now4.4Wind438 km/sBz-6 nTAurora44 GWDst-66 nTFlare—NEAs0