Solar flares on March 18, 2026
The most powerful solar flare in 24 hours
M2.7 (strong) flare - March 18 at 4:42 AM
Solar activity index
Value as of the end of the day on March 18, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from March 17, 2026 to March 18, 2026
Time zone — UTC-04 (Thunder bay) — summer time
List of solar flares for March 18, 2026
The total number of solar flares of class C and higher — 7 flares
C class — 6 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.0 | 12:45 | 12:54 | 12:58 | 4392 |
| C3.6 | 08:53 | 09:11 | 09:21 | 4392 |
| C2.8 | 05:48 | 06:02 | 06:12 | 4392 |
| M2.7 | 04:26 | 04:42 | 04:57 | 4392 |
| C2.7 | 02:44 | 02:59 | 03:09 | 4392 |
| C1.2 | 00:23 | 00:34 | 00:37 | 4397 |
| C1.1 | 23:58 | 00:19 | 00:23 | 4397 |