Viewing archive of Tuesday, 21 July 1998
GFZ Potsdam official Kp-index
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Disturbance storm-time index
NOAA estimated Kp-index
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All times in UTC
Latest news
Tuesday, 15 April 2025
CME arrival, G3 storm watch
Friday, 28 March 2025
X1.1 solar flare
Monday, 24 March 2025
Coronal hole faces Earth
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Incoming & Unnumbered Active Regions 17412025/04/12-13 Filament CMEs 2025/04/16 G3 Watch 446AR4062 33AR4064 8AR 4060 31
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Latest alerts
21:45 UTC - Geomagnetic activity
Minor G1 geomagnetic storm (Kp5) Threshold Reached: 21:36 UTC
21:00 UTC - Geomagnetic activity
Severe G4 geomagnetic storm (Kp8) Threshold Reached: 20:55 UTC
19:45 UTC - Geomagnetic activity
Strong G3 geomagnetic storm (Kp7) Threshold Reached: 19:25 UTC
19:00 UTC - Geomagnetic activity
Moderate G2 geomagnetic storm (Kp6) Threshold Reached: 18:38 UTC
18:45 UTC - Geomagnetic activity
Minor G1 geomagnetic storm (Kp5) Threshold Reached: 18:28 UTC
Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/15 | M1.2 |
| Last geomagnetic storm | 2025/04/15 | Kp6+ (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2025 | 134.2 -20.4 |
| April 2025 | 124.1 -10.1 |
| Last 30 days | 122.5 -17.8 |