Compare
Compare two space-weather days side by side, or pit today against the most powerful storms in history.
Day A quick-select:
Day B quick-select:
Metric
2026-09-26
—
Kp max (24h)
4.0
—
Kp latest
4.0
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Solar wind
452 km/s
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Bz
-1.8 nT
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Aurora power
0 GW
—
Dst
-31 nT
—
Flare class
B
—
NEAs
5
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2026-09-26
Kp peaked at 4.0 (below storm threshold); solar wind 452 km/s; aurora 0 GW; Dst -31 nT; flare B-class; nearest asteroid 2025 UK9 at 0.8 LD.
G-scale: G1 minor