In 2026 the planetary Kp peaked at 8.7 (G4) on 19 January 2026: 51 storm nights over the year, and 5.2% of its three-hour intervals at storm level — provisional, the year is still running.
| Month | Max Kp | Peak day | Storm nights | By class | At storm level | Avg Kp |
|---|---|---|---|---|---|---|
| January | 8.7 | 19 | 10 | G1×6G2×1G3×1G4×2 | 10.1% | 2.8 |
| February | 5.7 | 16 | 6 | G1×5G2×1 | 4.0% | 2.4 |
| March | 7.0 | 21 | 8 | G1×3G2×3G3×2 | 8.9% | 2.4 |
| April | 6.3 | 3 | 7 | G1×5G2×2 | 7.5% | 2.1 |
| May | 6.0 | 4 | 4 | G1×1G2×3 | 3.2% | 1.9 |
| June | 6.0 | 5 | 5 | G1×4G2×1 | 3.8% | 1.9 |
| July | 7.0 | 4 | 2 | G1×1G3×1 | 3.6% | 1.8 |
| August | 6.0 | 8 | 4 | G1×2G2×2 | 2.4% | 1.6 |
| September | 5.0 | 8 | 2 | G1×2 | 1.3% | 1.6 |
| October · provisional | 7.3 | 10 | 3 | G1×1G2×1G3×1 | 9.0% | 2.2 |
All-time record: Kp 9.0 — reached on 27 days, most recently 2024-05-11.
Ranked from the data: peak Kp, then intervals spent at 9.0. Nicknames and reach notes only where documented.
Solar Cycle 25 beside the last three maxima →The latest archived week — Kp day by day →The book's frames and that hour's Kp →Two ways to hear about aurora — the whole planet, or your one spot. Free browser notifications, no email, unsubscribe in a tap.
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