The aurora and solar activity archive
Searching for historical solar and auroral activity data? The archive is filled with data between the year 1996 and yesterday. You can choose a viewing mode to quickly look for days with interesting space weather and pick a day to view the archived data for that day with more detailed space weather data.
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April 1997 |
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Friday Fri. |
Saturday Sat. |
Sunday Sun. |
1C3 Kp4+ | 2C3.06 Kp3 | 3C1.64 Kp4- | 4B1.49 Kp4 | 5B7.37 Kp4- | 6B3.46 Kp3+ | |
7C9.01 Kp3 | 8Kp2- | 9C1.99 Kp3- | 10Kp5 | 11Kp7- | 12Kp3+ | 13C1.18 Kp3+ |
14C1.6 Kp2 | 15C2.07 Kp2 | 16B4.51 Kp5 | 17B3.49 Kp5+ | 18Kp4- | 19Kp3+ | 20Kp2 |
21Kp5- | 22Kp5+ | 23Kp4- | 24Kp5- | 25Kp2+ | 26B9.74 Kp1 | 27Kp2- |
28Kp1 | 29Kp2- | 30Kp3+ | ||||
Latest news
Monday, 30 March 2026
X1.5 solar flare
Tuesday, 17 March 2026
M2.7 solar flare, CME arrival possible
Sunday, 1 February 2026
Complex sunspot region 4366
Latest forum messages
Incoming & Unnumbered Active Regions 268Planet-moon interactions and space weather 3AR4416 13Unspecified geomagnetic activity 151Filaments and prominences 543
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Space weather facts
| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/09 | M1.0 |
| Last geomagnetic storm | 2026/04/03 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 101.7 +15.8 |
| Last 30 days | 97.5 +41.1 |
This day in history*
Aurora on this day in history
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