Solar Flares in September, 2017
28 flares ↑ MAX: X9.3 ↓ MIN: A1.2
28 flares ↑ MAX: X9.3 ↓ MIN: A1.2
In September 2017, 28 solar flares were recorded; the strongest was X9.3 on September 6, 2017. The longest run of consecutive active days was 7 (4 Sep–10 Sep).
Most powerful Solar Flares in September 2017
| Date | Class | Level | Duration |
|---|---|---|---|
| September 6, 2017 | X9.3 | High level | 4 h 51 min |
| September 10, 2017 | X8.3 | High level | 5 h 56 min |
| September 7, 2017 | X1.4 | High level | 1 h 6 min |
| September 8, 2017 | M8.1 | Moderate level | 33 min |
| September 6, 2017 | M7.7 | Moderate level | 1 h 47 min |
| September 7, 2017 | M7.4 | Moderate level | 26 min |
| September 4, 2017 | M5.5 | Moderate level | 3 h 21 min |
| September 5, 2017 | M4.2 | Moderate level | 7 min |
| September 7, 2017 | M3.9 | Moderate level | 21 min |
| September 5, 2017 | M3.8 | Moderate level | 6 min |
| September 9, 2017 | M3.8 | Moderate level | 1 h 1 min |
| September 5, 2017 | M3.2 | Moderate level | 46 min |
| September 8, 2017 | M3 | Moderate level | 36 min |
| September 7, 2017 | M2.5 | Moderate level | 3 min |
| September 5, 2017 | M2.3 | Moderate level | 7 min |
| September 8, 2017 | M2.1 | Moderate level | 11 min |
| September 4, 2017 | M1.5 | Moderate level | — |
| September 6, 2017 | M1.4 | Moderate level | 11 min |
| September 4, 2017 | M1.3 | Moderate level | 6 min |
| September 8, 2017 | M1.3 | Moderate level | 1 min |
| September 6, 2017 | M1.2 | Moderate level | 1 min |
| September 8, 2017 | M1.2 | Moderate level | — |
| September 9, 2017 | M1.2 | Moderate level | 13 min |
| September 6, 2017 | M1.1 | Moderate level | 1 min |
| September 9, 2017 | M1.1 | Moderate level | — |
| September 4, 2017 | M1 | Moderate level | — |
| September 5, 2017 | M1 | Moderate level | — |
| September 9, 2017 | M1 | Moderate level | — |