Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 4173
C31
M7
X1
LargestX2.31983-05-15
Span7 days
Flares by day
6
5
9
6
7
5
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1983-05-10 | 11:06 | 12:11 | 154 | M3.1 | S13W16 | 4173 |
| 1983-05-10 | 13:50 | 14:25 | 115 | C1.8 | S11W18 | 4173 |
| 1983-05-10 | 16:27 | 16:31 | 30 | C3.9 | S12W19 | 4173 |
| 1983-05-10 | 18:00 | 18:42 | 176 | C5.7 | S12W22 | 4173 |
| 1983-05-10 | 23:33 | 23:38 | 7 | C1.2 | S11W26 | 4173 |
| 1983-05-10 | 23:44 | 23:46 | 12 | C1.8 | S11W24 | 4173 |
| 1983-05-11 | 03:54 | 04:08 | 51 | M3.1 | S11W24 | 4173 |
| 1983-05-11 | 04:50 | 04:51 | 9 | C4.4 | S12W27 | 4173 |
| 1983-05-11 | 13:22 | 13:29 | 117 | M1.3 | S12W30 | 4173 |
| 1983-05-11 | 22:07 | 22:14 | 21 | M2.5 | – | 4173 |
| 1983-05-11 | 23:53 | 00:25 | 47 | C6.0 | S10W38 | 4173 |
| 1983-05-12 | 01:50 | 01:57 | 15 | C8.2 | S12W36 | 4173 |
| 1983-05-12 | 04:22 | 04:33 | 20 | C2.7 | S11W42 | 4173 |
| 1983-05-12 | 08:34 | 08:38 | 28 | C2.9 | S10W42 | 4173 |
| 1983-05-12 | 08:57 | 08:59 | 5 | C2.6 | S08W32 | 4173 |
| 1983-05-12 | 13:34 | 13:40 | 101 | M2.2 | S12W44 | 4173 |
| 1983-05-12 | 15:29 | 15:32 | 6 | C2.5 | S06W42 | 4173 |
| 1983-05-12 | 16:19 | 16:21 | 15 | C3.4 | S08W44 | 4173 |
| 1983-05-12 | 17:21 | 17:21 | 11 | C2.4 | S09W48 | 4173 |
| 1983-05-12 | 20:40 | 20:45 | 45 | C3.5 | S07W45 | 4173 |
| 1983-05-13 | 06:29 | 06:40 | 19 | C6.2 | S07W55 | 4173 |
| 1983-05-13 | 07:16 | 07:20 | 7 | C1.9 | S11W56 | 4173 |
| 1983-05-13 | 11:09 | 11:13 | 7 | C2.8 | – | 4173 |
| 1983-05-13 | 14:20 | 14:25 | 42 | C4.8 | S09W55 | 4173 |
| 1983-05-13 | 18:40 | 19:05 | 53 | C2.1 | S10W60 | 4173 |
| 1983-05-13 | 23:39 | 23:40 | 21 | C1.1 | S08W58 | 4173 |
| 1983-05-14 | 03:47 | 04:17 | 92 | C4.7 | – | 4173 |
| 1983-05-14 | 06:28 | 06:29 | 13 | C2.0 | S10W71 | 4173 |
| 1983-05-14 | 07:25 | 07:35 | 27 | M1.8 | S11W70 | 4173 |
| 1983-05-14 | 08:35 | 08:37 | 32 | C5.0 | S10W71 | 4173 |
| 1983-05-14 | 14:13 | 14:14 | 7 | C3.2 | S19W70 | 4173 |
| 1983-05-14 | 15:35 | 16:20 | 80 | C5.1 | S11W68 | 4173 |
| 1983-05-14 | 18:06 | 18:07 | 12 | C2.2 | S11W72 | 4173 |
| 1983-05-15 | 08:40 | 08:45 | 58 | X2.3 | S10W78 | 4173 |
| 1983-05-15 | 15:53 | 15:57 | 11 | C1.8 | S11W81 | 4173 |
| 1983-05-15 | 16:08 | 16:12 | 14 | C3.3 | S12W80 | 4173 |
| 1983-05-15 | 17:43 | 17:53 | 22 | C2.0 | S12W80 | 4173 |
| 1983-05-15 | 22:24 | 22:25 | 18 | C2.0 | S10W82 | 4173 |
| 1983-05-16 | 13:59 | 14:09 | 29 | M1.3 | S09W90 | 4173 |
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 4173 produced 39 C+ flares between 1983-05-10 and 1983-05-16.