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Today two years ago: the strongest solar flare of this cycle?
Number 35... the X1.6 solar flare that occured on September 10 was the 35th X-class solar flare of this solar cycle. It was a powerful solar flare but as far as X-class solar flares go... it was with a peak flux of X1.6 actually only a relatively modest solar flare when you consider that solar flares can get 10 or even 20 times stronger than that. The true X-treme solar flares are the so called ''super X-class solar flares''... X-class solar flares that peak at X10 or even higher. We have yet to see such a solar flare this cycle... or have we?
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Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/01 | M2.4 |
| Last geomagnetic storm | 2025/03/27 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2025 | 154.6 +17.6 |
| April 2025 | 147 -7.6 |
| Last 30 days | 128.8 -21.8 |