Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 4171
C19
M3
X3
LargestX3.11983-05-07
Span13 days
Flares by day
1
1
7
4
3
2
4
1
2
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1983-05-04 | 22:56 | 22:57 | 9 | C4.3 | S28E09 | 4171 |
| 1983-05-05 | 22:56 | 22:57 | 9 | C4.3 | S28E89 | 4171 |
| 1983-05-07 | 01:29 | 01:34 | 34 | C1.8 | S26E77 | 4171 |
| 1983-05-07 | 07:43 | 07:46 | 28 | M1.0 | S28E72 | 4171 |
| 1983-05-07 | 15:39 | 15:41 | 9 | C1.9 | S29E69 | 4171 |
| 1983-05-07 | 17:14 | 17:16 | 13 | C4.2 | S29E68 | 4171 |
| 1983-05-07 | 19:05 | 19:27 | 25 | C8.0 | S29E66 | 4171 |
| 1983-05-07 | 20:14 | 20:22 | 14 | C1.4 | S29E66 | 4171 |
| 1983-05-07 | 22:16 | 22:16 | 49 | X3.1 | S30E67 | 4171 |
| 1983-05-08 | 02:24 | 03:17 | 409 | X1.3 | S31E62 | 4171 |
| 1983-05-08 | 19:13 | 19:21 | 20 | C2.1 | S28E54 | 4171 |
| 1983-05-08 | 19:51 | 19:52 | 12 | C1.9 | S29E53 | 4171 |
| 1983-05-08 | 23:40 | 00:17 | 64 | C1.3 | S28E52 | 4171 |
| 1983-05-09 | 03:02 | 03:03 | 18 | C2.0 | S29E50 | 4171 |
| 1983-05-09 | 21:07 | 21:12 | 34 | C1.1 | S31E39 | 4171 |
| 1983-05-09 | 23:02 | 23:07 | 65 | X2.4 | S29E39 | 4171 |
| 1983-05-11 | 14:20 | 14:23 | 72 | M1.9 | S30E19 | 4171 |
| 1983-05-11 | 23:20 | 23:39 | 30 | C5.9 | S28E14 | 4171 |
| 1983-05-12 | 02:37 | 02:56 | 69 | M5.6 | S30E15 | 4171 |
| 1983-05-12 | 04:55 | 04:57 | 7 | C6.4 | S28E13 | 4171 |
| 1983-05-12 | 21:41 | 21:42 | 5 | C1.2 | S31E02 | 4171 |
| 1983-05-12 | 22:21 | 22:22 | 56 | C1.7 | S29E03 | 4171 |
| 1983-05-13 | 12:43 | 12:46 | 5 | C2.0 | – | 4171 |
| 1983-05-16 | 15:36 | 15:39 | 41 | C2.1 | S32W53 | 4171 |
| 1983-05-16 | 16:29 | 16:33 | 124 | C5.7 | S29W54 | 4171 |
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 4171 produced 25 C+ flares between 1983-05-04 and 1983-05-16.