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Solar flares in May 1981
C-class259
M-class17
X-class3
LargestX1.51981-05-13
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| May 1980 | 213 | 32 | 3 | X3.0 |
| May 1981 | 259 | 17 | 3 | X1.5 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1981-05-13 | 03:40 | 04:28 | 150 | X1.5 | N11E58 | 3106 |
| 1981-05-16 | 08:06 | 08:46 | 70 | X1.1 | N14E14 | 3106 |
| 1981-05-05 | 14:06 | 14:10 | 38 | X1.0 | – | 3080 |
| 1981-05-04 | 08:36 | 08:39 | 67 | M9.5 | N14E16 | 3080 |
| 1981-05-05 | 22:54 | 22:59 | 66 | M4.4 | N18W04 | 3080 |
| 1981-05-10 | 12:08 | 12:56 | 112 | M3.5 | – | 3106 |
| 1981-05-11 | 05:46 | 05:48 | 7 | M2.9 | N10E04 | 3099 |
| 1981-05-14 | 08:36 | 08:56 | 58 | M2.8 | – | 3106 |
| 1981-05-09 | 02:39 | 02:48 | 11 | M2.6 | N05W54 | 3079 |
| 1981-05-11 | 15:55 | 16:08 | 19 | M2.0 | – | 3099 |
| 1981-05-09 | 22:03 | 22:11 | 22 | M1.9 | – | 3099 |
| 1981-05-08 | 22:50 | 22:51 | 30 | M1.7 | N09E37 | 3099 |
| 1981-05-14 | 03:15 | 03:15 | 10 | M1.4 | N11W33 | 3099 |
| 1981-05-10 | 07:12 | 07:31 | 39 | M1.3 | – | 3079 |
| 1981-05-10 | 04:59 | 05:07 | 49 | M1.2 | N09E20 | 3099 |
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
279 flares of class C or larger in May 1981; by M/X count it ranks 159 of 565 months.