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Solar flares in December 1977
C-class81
M-class17
X-class0
LargestM0.71977-12-10
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| December 1976 | 14 | 0 | 0 | C0.4 |
| December 1977 | 81 | 17 | 0 | M0.7 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1977-12-10 | 03:05 | 03:15 | 22 | M0.7 | S28E16 | 950 |
| 1977-12-11 | 21:45 | 22:13 | 87 | M0.5 | S26W08 | 950 |
| 1977-12-30 | 04:06 | 04:11 | 16 | M0.5 | S16E38 | 967 |
| 1977-12-06 | 19:33 | 19:34 | 17 | M0.4 | S18W09 | 947 |
| 1977-12-26 | 23:25 | 23:27 | 13 | M0.4 | S26W72 | 965 |
| 1977-12-26 | 02:25 | 02:30 | 5 | M0.3 | S20E90 | 967 |
| 1977-12-12 | 02:33 | 02:37 | 47 | M0.2 | S26W11 | 950 |
| 1977-12-07 | 15:34 | 15:50 | 44 | M0.1 | S25E48 | 950 |
| 1977-12-07 | 17:19 | 17:53 | 159 | M0.1 | S25E50 | 950 |
| 1977-12-27 | 07:00 | 07:06 | 20 | M0.1 | S25W75 | 965 |
| 1977-12-27 | 10:51 | 10:56 | 9 | M0.1 | S26W70 | 965 |
| 1977-12-28 | 08:58 | 09:04 | 30 | M0.1 | S19E70 | 967 |
| 1977-12-29 | 00:12 | 00:35 | 53 | M0.1 | S18E81 | 970 |
| 1977-12-29 | 09:04 | 09:05 | 6 | M0.1 | S18E77 | 970 |
| 1977-12-29 | 11:43 | 11:45 | 6 | M0.1 | S18E49 | 967 |
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
98 flares of class C or larger in December 1977; by M/X count it ranks 173 of 565 months.