2017-05-28 · historical storm
Historical snapshot — data recorded on 2026-08-12, not live
Space weather — 2017-05-28
Daily Statistics Brief
On 2017-05-28, the planetary Kp index peaked at 7.0 (G4 severe). solar wind speed reached 690 km/s and Bz dipped to -15 nT. Auroral hemispheric power was 260 GW. The Dst index reached -125 nT.
Aurora Oval — Peak Kp 7.0
Severe storm — aurora visible at mid-latitudes.
Auroral power: 260 GW
Kp max7.0Kp now7.0Wind690 km/sBz-15 nTAurora260 GWDst-125 nTFlare—NEAs0