Solar flares on April 18, 2025
The most powerful solar flare in 24 hours
M4.4 (strong) flare - April 18 at 11:50 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+00
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 | 23:08 | 23:50 | 00:15 | — |
| C2.6 | 21:48 | 21:52 | 21:56 | 4064 |
| C1.4 | 21:11 | 21:17 | 21:24 | 4064 |
| C1.6 | 12:03 | 12:12 | 12:20 | 4066 |
| C1.8 | 05:51 | 06:01 | 06:14 | 4062 |
| C2.2 | 04:10 | 04:22 | 04:29 | 4060 |