Solar flares on April 18, 2025
The most powerful solar flare in 24 hours
M4.4 (strong) flare - April 18 at 7:50 PM
Solar activity index
Value as of the end of the day on April 18, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 17, 2025 to April 18, 2025
Time zone — UTC-04 (Kapuskasing) — summer time
List of solar flares for April 18, 2025
The total number of solar flares of class C and higher — 6 flares
C class — 5 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M4.4 | 19:08 | 19:50 | 20:15 | — |
| C2.6 | 17:48 | 17:52 | 17:56 | 4064 |
| C1.4 | 17:11 | 17:17 | 17:24 | 4064 |
| C1.6 | 08:03 | 08:12 | 08:20 | 4066 |
| C1.8 | 01:51 | 02:01 | 02:14 | 4062 |
| C2.2 | 00:10 | 00:22 | 00:29 | 4060 |