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Solar flares in May 1990
C-class151
M-class28
X-class8
LargestX9.31990-05-24
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| May 1989 | 202 | 45 | 2 | X2.4 |
| May 1990 | 151 | 28 | 8 | X9.3 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1990-05-24 | 20:46 | 20:49 | 59 | X9.3 | N33W78 | 6063 |
| 1990-05-21 | 22:12 | 22:17 | 87 | X5.5 | N35W36 | 6063 |
| 1990-05-11 | 20:58 | 21:00 | 29 | X3.6 | N29E86 | 6063 |
| 1990-05-10 | 19:18 | 19:30 | 70 | X3.4 | – | – |
| 1990-05-11 | 05:37 | 05:48 | 29 | X2.4 | – | – |
| 1990-05-15 | 12:46 | 13:10 | 207 | X1.7 | N42E38 | 6063 |
| 1990-05-26 | 20:45 | 20:58 | 48 | X1.4 | – | – |
| 1990-05-12 | 11:32 | 11:37 | 39 | X1.2 | N31E74 | 6063 |
| 1990-05-23 | 04:01 | 04:20 | 94 | M8.7 | N33W55 | 6063 |
| 1990-05-21 | 01:22 | 01:25 | 53 | M4.8 | N33W30 | 6063 |
| 1990-05-10 | 15:21 | 15:39 | 65 | M3.9 | – | – |
| 1990-05-08 | 18:46 | 18:47 | 20 | M3.3 | N15E02 | 6049 |
| 1990-05-22 | 00:07 | 00:55 | 132 | M3.2 | S16W44 | 6064 |
| 1990-05-23 | 08:51 | 09:04 | 69 | M2.7 | – | – |
| 1990-05-13 | 12:50 | 12:54 | 75 | M2.4 | S18E72 | 6064 |
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
187 flares of class C or larger in May 1990; by M/X count it ranks 81 of 565 months.