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Solar flares in December 1978
C-class78
M-class25
X-class7
LargestX0.21978-12-12
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| December 1977 | 81 | 17 | 0 | M0.7 |
| December 1978 | 78 | 25 | 7 | X0.2 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1978-12-12 | 15:03 | 15:14 | 93 | X0.2 | S19W73 | 1447 |
| 1978-12-12 | 20:12 | 20:12 | 11 | X0.2 | S15E01 | 1444 |
| 1978-12-11 | 18:33 | 19:42 | 105 | X0.1 | S17E14 | 1444 |
| 1978-12-12 | 18:36 | 18:36 | 24 | X0.1 | S17W64 | 1447 |
| 1978-12-13 | 23:53 | 23:58 | 27 | X0.1 | S17W79 | 1447 |
| 1978-12-14 | 07:22 | 07:24 | 13 | X0.1 | S15W80 | 1447 |
| 1978-12-27 | 16:27 | 16:37 | 93 | X0.1 | S13E39 | 1476 |
| 1978-12-11 | 18:07 | 19:25 | 318 | M0.7 | S16W48 | 1447 |
| 1978-12-10 | 23:40 | 00:39 | 65 | M0.3 | S13E28 | 1444 |
| 1978-12-18 | 23:48 | 23:50 | 16 | M0.3 | S20W90 | 1453 |
| 1978-12-30 | 05:49 | 06:07 | 31 | M0.3 | S20E67 | 1488 |
| 1978-12-03 | 20:32 | 20:33 | 10 | M0.2 | S22E65 | 1442 |
| 1978-12-07 | 23:45 | 23:48 | 35 | M0.2 | S16W55 | 1429 |
| 1978-12-10 | 02:00 | 02:07 | 8 | M0.2 | S31W90 | 1437 |
| 1978-12-13 | 00:17 | 00:18 | 46 | M0.2 | S18W67 | 1447 |
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
110 flares of class C or larger in December 1978; by M/X count it ranks 100 of 565 months.