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Solar flares in May 1978
C-class85
M-class24
X-class2
LargestX0.21978-05-07
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| May 1977 | 7 | 1 | 0 | M0.1 |
| May 1978 | 85 | 24 | 2 | X0.2 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1978-05-07 | 03:33 | – | 47 | X0.2 | N22W68 | 1095 |
| 1978-05-28 | 14:57 | 15:02 | 10 | X0.1 | N17W10 | 1129 |
| 1978-05-09 | 14:42 | 14:43 | 26 | M0.9 | N22W90 | 1095 |
| 1978-05-01 | 19:28 | 19:59 | 151 | M0.6 | N21W04 | 1092 |
| 1978-05-08 | 12:12 | 12:48 | 60 | M0.6 | N22W76 | 1095 |
| 1978-05-30 | 07:16 | 07:21 | 57 | M0.6 | N17W26 | 1129 |
| 1978-05-31 | 10:44 | 11:25 | 174 | M0.6 | N16W48 | 1129 |
| 1978-05-08 | 00:35 | 00:37 | 8 | M0.5 | N22W75 | 1095 |
| 1978-05-07 | 15:44 | 16:12 | 43 | M0.4 | N18W66 | 1095 |
| 1978-05-26 | 17:34 | 17:52 | 53 | M0.4 | N18E60 | 1134 |
| 1978-05-30 | 19:26 | 19:26 | 54 | M0.4 | N17W38 | 1129 |
| 1978-05-02 | 01:18 | 01:20 | 51 | M0.2 | N26E03 | 1092 |
| 1978-05-03 | 19:40 | 20:21 | 75 | M0.2 | N19W31 | 1092 |
| 1978-05-07 | 00:53 | 00:56 | 35 | M0.2 | N22W60 | 1095 |
| 1978-05-23 | 01:06 | 01:07 | 8 | M0.2 | N25E85 | 1131 |
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
111 flares of class C or larger in May 1978; by M/X count it ranks 120 of 565 months.