Solar flares on September 20, 2015
The most powerful solar flare in 24 hours
M2.1 (strong) flare - September 20 at 2:03 PM
Solar activity index
Value as of the end of the day on September 20, 2015
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 19, 2015 to September 20, 2015
Time zone — UTC-04 (Fermont) — summer time
List of solar flares for September 20, 2015
The total number of solar flares of class C and higher — 6 flares
C class — 4 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.2 | 21:57 | 22:04 | 22:08 | 2420 |
| C2.8 | 20:10 | 20:21 | 20:29 | 2420 |
| M2.1 | 13:32 | 14:03 | 14:29 | 2415 |
| C1.4 | 10:09 | 10:14 | 10:24 | 2415 |
| C2.6 | 05:32 | 05:34 | 05:36 | 2415 |
| M1.5 | 00:55 | 01:03 | 01:17 | 2420 |