2025-12-21
Historical snapshot — data recorded on 2026-08-12, not live
Space weather — 2025-12-21
Daily Statistics Brief
On 2025-12-21, the planetary Kp index peaked at 1.8 (G0 quiet). solar wind speed reached 386 km/s and Bz dipped to -4 nT. Auroral hemispheric power was 18 GW. The Dst index reached -27 nT.
Aurora Oval — Peak Kp 1.8
Quiet — aurora near polar regions only.
Auroral power: 18 GW
Kp max1.8Kp now1.8Wind386 km/sBz-4 nTAurora18 GWDst-27 nTFlare—NEAs0