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Solar flares in December 1990
C-class278
M-class50
X-class3
LargestX1.91990-12-26
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| December 1989 | 145 | 37 | 2 | X2.8 |
| December 1990 | 278 | 50 | 3 | X1.9 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1990-12-26 | 13:55 | 14:01 | 93 | X1.9 | S26E21 | 6420 |
| 1990-12-24 | 15:33 | 15:46 | 33 | X1.8 | N10W80 | 6412 |
| 1990-12-23 | 09:43 | 10:01 | 46 | X1.0 | N11W68 | 6412 |
| 1990-12-12 | 14:13 | 14:13 | 12 | M8.9 | N10W72 | 6398 |
| 1990-12-04 | 01:58 | 02:02 | 48 | M6.6 | N08E56 | 6397 |
| 1990-12-11 | 20:41 | 20:44 | 24 | M6.5 | S11W80 | 6402 |
| 1990-12-10 | 06:57 | 07:55 | 136 | M5.8 | N15W47 | 6398 |
| 1990-12-22 | 21:52 | 22:34 | 92 | M5.3 | S25E63 | 6420 |
| 1990-12-12 | 07:55 | 08:03 | 64 | M5.1 | N20W73 | 6399 |
| 1990-12-22 | 23:12 | 23:14 | 20 | M4.3 | N13W87 | 6415 |
| 1990-12-12 | 03:36 | 03:44 | 62 | M4.0 | – | – |
| 1990-12-30 | 14:47 | 15:14 | 56 | M4.0 | S09W45 | 6424 |
| 1990-12-14 | 13:39 | 13:39 | 1 | M3.9 | N16E32 | 6412 |
| 1990-12-20 | 07:05 | 07:21 | 79 | M3.7 | N14W47 | 6415 |
| 1990-12-19 | 14:51 | 15:05 | 78 | M3.0 | N15W23 | 6412 |
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
331 flares of class C or larger in December 1990; by M/X count it ranks 31 of 565 months.