Solar flares on October 16, 2025
The most powerful solar flare in 24 hours
M1.5 (strong) flare - October 16 at 8:28 PM
Solar activity index
Value as of the end of the day on October 16, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 15, 2025 to October 16, 2025
Time zone — UTC-05 (Dallas) — summer time
List of solar flares for October 16, 2025
The total number of solar flares of class C and higher — 16 flares
C class — 12 | M class — 4 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.5 | 20:15 | 20:28 | 20:40 | 4246 |
| M1.0 | 18:12 | 18:19 | 18:28 | 4246 |
| C5.5 | 17:38 | 17:54 | 18:02 | 4246 |
| C5.8 | 15:40 | 15:43 | 15:46 | 4246 |
| C4.4 | 15:26 | 15:35 | 15:40 | 4246 |
| M1.1 | 14:00 | 14:16 | 14:36 | 4246 |
| C4.7 | 10:59 | 11:06 | 11:08 | 4246 |
| M1.3 | 08:53 | 09:08 | 09:22 | 4246 |
| C6.0 | 08:03 | 08:08 | 08:12 | 4246 |
| C8.4 | 06:41 | 07:03 | 07:25 | 4246 |
| C5.3 | 04:53 | 05:05 | 05:14 | 4246 |
| C3.5 | 04:41 | 04:49 | 04:53 | 4246 |
| C3.3 | 03:44 | 03:49 | 03:51 | 4246 |
| C5.1 | 02:56 | 03:01 | 03:13 | 4246 |
| C4.6 | 02:24 | 02:31 | 02:36 | 4246 |
| C5.5 | 01:36 | 01:43 | 01:47 | 4246 |