Viewing archive of Sunday, 14 September 1997
GFZ Potsdam official Kp-index
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GFZ Potsdam Hp-index
Disturbance storm-time index
NOAA estimated Kp-index
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Monday, 1 December 2025
X1.9 solar flare, Coronal hole faces Earth
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X4.0 solar flare
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X5.1 solar flare, G4 geomagnetic storm watch
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Space weather facts
| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/06 | M8.1 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 175.4 +83.6 |
| Last 30 days | 107.3 +14.6 |