Solar flares on September 16, 2025
The most powerful solar flare in 24 hours
C3.5 (normal) flare - September 16 at 5:28 PM
Solar activity index
Value as of the end of the day on September 16, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 15, 2025 to September 16, 2025
Time zone — UTC+05:30 (Pune)
List of solar flares for September 16, 2025
The total number of solar flares of class C and higher — 8 flares
C class — 8 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.5 | 17:24 | 17:28 | 17:31 | 4220 |
| C1.8 | 16:40 | 16:58 | 17:04 | 4223 |
| C1.7 | 16:19 | 16:30 | 16:40 | 4223 |
| C2.5 | 10:16 | 10:28 | 10:39 | 4217 |
| C1.8 | 08:24 | 08:34 | 08:39 | 4217 |
| C1.4 | 02:34 | 02:38 | 02:40 | 4217 |
| C1.3 | 02:24 | 02:31 | 02:34 | 4217 |
| C3.5 | 23:53 | 00:01 | 00:16 | 4213 |