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Solar flares in October 1977
C-class33
M-class5
X-class1
LargestX0.11977-10-12
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| October 1976 | 5 | 0 | 0 | C0.2 |
| October 1977 | 33 | 5 | 1 | X0.1 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1977-10-12 | 01:58 | 02:00 | 22 | X0.1 | N08W03 | 908 |
| 1977-10-06 | 04:29 | 04:38 | 9 | M0.8 | N33W57 | 899 |
| 1977-10-06 | 05:05 | 05:05 | 13 | M0.4 | N33W57 | 899 |
| 1977-10-05 | 13:23 | 13:26 | 11 | M0.1 | N09E90 | 908 |
| 1977-10-06 | 08:05 | 08:09 | 26 | M0.1 | N06E82 | 908 |
| 1977-10-06 | 10:55 | 11:01 | 18 | M0.1 | N07E80 | 908 |
| 1977-10-06 | 19:46 | 19:50 | 15 | C0.8 | N29W66 | 899 |
| 1977-10-13 | 17:07 | 17:16 | 31 | C0.7 | N06W21 | 908 |
| 1977-10-07 | 22:23 | 22:23 | 1 | C0.6 | N06E57 | 908 |
| 1977-10-08 | 02:31 | 02:32 | 29 | C0.5 | N06E55 | 908 |
| 1977-10-22 | 04:10 | 04:12 | 6 | C0.5 | N20W75 | 917 |
| 1977-10-06 | 00:28 | 00:30 | 12 | C0.4 | N30W53 | 899 |
| 1977-10-08 | 12:35 | 12:42 | 51 | C0.4 | N08E43 | 908 |
| 1977-10-03 | 23:23 | 23:25 | 12 | C0.3 | N13W30 | 898 |
| 1977-10-04 | 23:56 | 23:57 | 10 | C0.3 | N13W31 | 898 |
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.
← September 1977November 1977 →
About this page
39 flares of class C or larger in October 1977; by M/X count it ranks 291 of 565 months.