Solar flares on October 16, 2025
The most powerful solar flare in 24 hours
M1.3 (strong) flare - October 16 at 2:08 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+00 (Reykjavik)
List of solar flares for October 16, 2025
The total number of solar flares of class C and higher — 17 flares
C class — 13 | M class — 4 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.0 | 23:12 | 23:19 | 23:28 | 4246 |
| C5.5 | 22:38 | 22:54 | 23:02 | 4246 |
| C5.8 | 20:40 | 20:43 | 20:46 | 4246 |
| C4.4 | 20:26 | 20:35 | 20:40 | 4246 |
| M1.1 | 19:00 | 19:16 | 19:36 | 4246 |
| C4.7 | 15:59 | 16:06 | 16:08 | 4246 |
| M1.3 | 13:53 | 14:08 | 14:22 | 4246 |
| C6.0 | 13:03 | 13:08 | 13:12 | 4246 |
| C8.4 | 11:41 | 12:03 | 12:25 | 4246 |
| C5.3 | 09:53 | 10:05 | 10:14 | 4246 |
| C3.5 | 09:41 | 09:49 | 09:53 | 4246 |
| C3.3 | 08:44 | 08:49 | 08:51 | 4246 |
| C5.1 | 07:56 | 08:01 | 08:13 | 4246 |
| C4.6 | 07:24 | 07:31 | 07:36 | 4246 |
| C5.5 | 06:36 | 06:43 | 06:47 | 4246 |
| C5.2 | 04:41 | 04:46 | 05:02 | 4246 |
| M1.1 | 00:17 | 00:21 | 00:24 | 4246 |