2020-12-09 · historical storm
Historical snapshot — data recorded on 2026-08-12, not live
Space weather — 2020-12-09
Daily Statistics Brief
On 2020-12-09, the planetary Kp index peaked at 6.0 (G3 strong). solar wind speed reached 620 km/s and Bz dipped to -12 nT. Auroral hemispheric power was 230 GW. The Dst index reached -75 nT.
Aurora Oval — Peak Kp 6.0
Active storm — aurora oval expanded equatorward.
Auroral power: 230 GW
Kp max6.0Kp now6.0Wind620 km/sBz-12 nTAurora230 GWDst-75 nTFlare—NEAs0