Solar Flare WatchHome › Flare history › 2011
Solar flares in March 2011
C-class145
M-class21
X-class1
LargestX1.52011-03-09
Sunspot number81.1NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| March 2010 | 9 | 0 | 0 | C3.8 |
| March 2011 | 145 | 21 | 1 | X1.5 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2011-03-09 | 23:13 | 23:23 | 16 | X1.5 | – | 11166 |
| 2011-03-08 | 10:35 | 10:44 | 20 | M5.3 | – | 11165 |
| 2011-03-08 | 18:08 | 18:28 | 33 | M4.4 | – | 11165 |
| 2011-03-14 | 19:30 | 19:52 | 24 | M4.2 | – | 11169 |
| 2011-03-07 | 19:43 | 20:12 | 75 | M3.7 | – | 11164 |
| 2011-03-07 | 13:45 | 14:30 | 71 | M1.9 | – | 11166 |
| 2011-03-07 | 09:14 | 09:20 | 14 | M1.8 | – | 11164 |
| 2011-03-09 | 10:35 | 11:07 | 46 | M1.7 | – | 11166 |
| 2011-03-09 | 13:17 | 14:02 | 56 | M1.7 | – | 11166 |
| 2011-03-07 | 07:49 | 07:54 | 7 | M1.5 | – | 11165 |
| 2011-03-07 | 21:45 | 21:50 | 10 | M1.5 | – | 11165 |
| 2011-03-08 | 03:37 | 03:58 | 43 | M1.5 | – | 11171 |
| 2011-03-07 | 07:59 | 08:07 | 16 | M1.4 | – | 11164 |
| 2011-03-08 | 19:46 | 20:16 | 93 | M1.4 | – | 11165 |
| 2011-03-23 | 02:03 | 02:17 | 21 | M1.4 | – | 11176 |
All times UTC. Until June 2017 classes are NOAA's reports of the time (GOES-15 and earlier included a 0.7 scaling factor); later classes come from calibrated GOES-16/18 data, so the same flare reads about 1.4× larger. Do not compare the two periods directly.
About this page
167 flares of class C or larger in March 2011; by M/X count it ranks 148 of 565 months.