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Solar flares from active region 4278
C18
M4
X0
LargestM5.51983-08-13
Span10 days
Flares by day
5
3
3
1
4
3
1
1
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1983-08-07 | 06:46 | 07:01 | 27 | C8.7 | – | 4278 |
| 1983-08-07 | 07:35 | 07:46 | 27 | M1.3 | – | 4278 |
| 1983-08-07 | 09:17 | 09:19 | 8 | C4.3 | S05E90 | 4278 |
| 1983-08-07 | 10:20 | 10:23 | 12 | C2.0 | – | 4278 |
| 1983-08-07 | 13:04 | 13:06 | 32 | C5.7 | S09E81 | 4278 |
| 1983-08-08 | 03:00 | 03:09 | 52 | M3.0 | S07E71 | 4278 |
| 1983-08-08 | 04:10 | 04:45 | 43 | M1.7 | – | 4278 |
| 1983-08-08 | 23:49 | 00:42 | 56 | C2.8 | S07E65 | 4278 |
| 1983-08-09 | 04:31 | 04:32 | 7 | C1.8 | S10E62 | 4278 |
| 1983-08-09 | 18:26 | 18:31 | 48 | C2.1 | S07W59 | 4278 |
| 1983-08-09 | 20:51 | 20:53 | 6 | C1.2 | S08E52 | 4278 |
| 1983-08-10 | 22:53 | 22:54 | 2 | C1.6 | S07E39 | 4278 |
| 1983-08-12 | 04:15 | 04:19 | 25 | C1.8 | S11E12 | 4278 |
| 1983-08-12 | 04:42 | 04:45 | 9 | C2.0 | – | 4278 |
| 1983-08-12 | 05:48 | 05:50 | 35 | C1.6 | S10E14 | 4278 |
| 1983-08-12 | 06:27 | 06:28 | 12 | C2.0 | S19E10 | 4278 |
| 1983-08-13 | 07:01 | 07:27 | 128 | C4.2 | S10E06 | 4278 |
| 1983-08-13 | 13:19 | 13:23 | 43 | C2.4 | S07E03 | 4278 |
| 1983-08-13 | 18:00 | 18:13 | 80 | M5.5 | S08E00 | 4278 |
| 1983-08-14 | 15:30 | 16:00 | 75 | C6.0 | S08W37 | 4278 |
| 1983-08-15 | 18:18 | 18:29 | 23 | C2.3 | S09W24 | 4278 |
| 1983-08-16 | 15:50 | 16:00 | 55 | C6.0 | S08W37 | 4278 |
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
NOAA active region 4278 produced 22 C+ flares between 1983-08-07 and 1983-08-16.