Solar flares on January 18, 2026
The most powerful solar flare in 24 hours
X1.9 (very strong) flare - January 18 at 1:09 PM
Solar activity index
Value as of the end of the day on January 18, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from January 17, 2026 to January 18, 2026
Time zone — UTC-05 (Washington)
List of solar flares for January 18, 2026
The total number of solar flares of class C and higher — 5 flares
C class — 4 | M class — 0 | X class — 1
| Class | begin | max | end | region |
|---|---|---|---|---|
| X1.9 | 12:27 | 13:09 | 13:51 | 4341 |
| C2.5 | 11:31 | 11:37 | 11:43 | 4341 |
| C2.3 | 08:59 | 09:04 | 09:10 | — |
| C2.2 | 06:42 | 06:48 | 06:55 | — |
| C7.1 | 01:01 | 01:20 | 01:32 | 4341 |