2021-05-12 · historical storm
Historical snapshot — data recorded on 2026-08-12, not live
Space weather — 2021-05-12
Daily Statistics Brief
On 2021-05-12, the planetary Kp index peaked at 6.7 (G3 strong). solar wind speed reached 660 km/s and Bz dipped to -14 nT. Auroral hemispheric power was 251 GW. The Dst index reached -96 nT.
Aurora Oval — Peak Kp 6.7
Active storm — aurora oval expanded equatorward.
Auroral power: 251 GW
Kp max6.7Kp now6.7Wind660 km/sBz-14 nTAurora251 GWDst-96 nTFlare—NEAs0