Solar Flare WatchSolar flares in 1977
C228
M36
X5
LargestX0.21977-09-07
M/X flares by month
- January 1977
- February 1977
- March 1977
- April 1977
- May 1977
- June 1977
- July 1977
- August 1977
- September 1977
- October 1977
- November 1977
- December 1977
Nearby years (M + X)
2
15
41
195
309
406
520
596
Top 20 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1977-09-07 | 22:27 | 22:33 | 6 | X0.2 | N10E90 | 889 |
| 1977-09-09 | 16:04 | 16:46 | 51 | X0.2 | N10E80 | 889 |
| 1977-09-19 | 10:28 | 10:38 | 100 | X0.2 | N08W58 | 889 |
| 1977-10-12 | 01:58 | 02:00 | 22 | X0.1 | N08W03 | 908 |
| 1977-11-22 | 10:26 | – | 61 | X0.1 | N24W38 | 939 |
| 1977-10-06 | 04:29 | 04:38 | 9 | M0.8 | N33W57 | 899 |
| 1977-12-10 | 03:05 | 03:15 | 22 | M0.7 | S28E16 | 950 |
| 1977-09-16 | 21:20 | 23:07 | 295 | M0.5 | N07W21 | 889 |
| 1977-12-11 | 21:45 | 22:13 | 87 | M0.5 | S26W08 | 950 |
| 1977-12-30 | 04:06 | 04:11 | 16 | M0.5 | S16E38 | 967 |
| 1977-10-06 | 05:05 | 05:05 | 13 | M0.4 | N33W57 | 899 |
| 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 |
| 1977-01-31 | 17:26 | 17:30 | 9 | M0.2 | N27E60 | 779 |
| 1977-04-13 | 23:34 | 23:44 | 25 | M0.2 | S21E58 | 807 |
| 1977-06-26 | 10:18 | 10:21 | 25 | M0.2 | N14E44 | 839 |
| 1977-06-26 | 13:36 | 13:41 | 13 | M0.2 | S21W16 | 837 |
| 1977-09-18 | 00:19 | 00:35 | 35 | M0.2 | N07W33 | 889 |
| 1977-09-20 | 03:00 | 03:13 | 18 | M0.2 | N11W59 | 889 |
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
269 flares of class C+ in 1977: 36 M-class and 5 X-class.