Solar flares on September 18, 2025
The most powerful solar flare in 24 hours
C3.6 (normal) flare - September 18 at 9:11 PM
Solar activity index
Value as of the end of the day on September 18, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 17, 2025 to September 18, 2025
Time zone — UTC+05:30 (Srinagar)
List of solar flares for September 18, 2025
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.6 | 21:04 | 21:11 | 21:16 | 4220 |
| C1.8 | 20:09 | 20:17 | 20:27 | 4020 |
| C1.7 | 07:04 | 07:08 | 07:10 | 4220 |
| C2.8 | 05:25 | 05:34 | 05:43 | 4217 |
| C1.6 | 04:12 | 04:17 | 04:21 | 4220 |
| C1.4 | 04:02 | 04:08 | 04:12 | 4220 |