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Solar flares in April 1978
C-class108
M-class15
X-class5
LargestX0.51978-04-28
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| April 1977 | 18 | 2 | 0 | M0.2 |
| April 1978 | 108 | 15 | 5 | X0.5 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1978-04-28 | 13:08 | 13:29 | 605 | X0.5 | N22E41 | 1092 |
| 1978-04-29 | 18:37 | 19:25 | 293 | X0.3 | N16E16 | 1092 |
| 1978-04-11 | 13:40 | 14:26 | 224 | X0.2 | N19W54 | 1057 |
| 1978-04-30 | 14:37 | 15:08 | 191 | X0.2 | N24E11 | 1092 |
| 1978-04-08 | 01:15 | 02:01 | 46 | X0.1 | N19W02 | 1057 |
| 1978-04-23 | 06:58 | – | 30 | M0.8 | N25E90 | 1092 |
| 1978-04-23 | 20:16 | 20:23 | 9 | M0.5 | N14W08 | 1083 |
| 1978-04-23 | 20:30 | 20:30 | 22 | M0.5 | N21W16 | 1086 |
| 1978-04-09 | 21:49 | 21:51 | 10 | M0.3 | N18E70 | 1070 |
| 1978-04-10 | 16:09 | 16:12 | 20 | M0.2 | N15E64 | 1070 |
| 1978-04-12 | 06:48 | 06:50 | 7 | M0.2 | N22W65 | 1057 |
| 1978-04-13 | 04:50 | 04:55 | 22 | M0.2 | N20W88 | 1057 |
| 1978-04-14 | 22:48 | 22:50 | 42 | M0.2 | N20W90 | 1057 |
| 1978-04-18 | 01:09 | 01:14 | 27 | M0.2 | N15W46 | 1070 |
| 1978-04-25 | 15:52 | 15:53 | 64 | M0.2 | N20E72 | 1092 |
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
128 flares of class C or larger in April 1978; by M/X count it ranks 158 of 565 months.