Solar flares on July 18, 2026
The most powerful solar flare in 24 hours
C2.3 (normal) flare - July 18 at 12:05 AM
Solar activity index
Value as of the end of the day on July 18, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 17, 2026 to July 18, 2026
Time zone — UTC-04 (Granby) — summer time
List of solar flares for July 18, 2026
The total number of solar flares of class C and higher — 2 flares
C class — 2 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.5 | 17:39 | 17:52 | 18:03 | 4492 |
| C2.3 | 23:56 | 00:05 | 00:14 | 4489 |