Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 5171
C27
M9
X2
LargestX3.21988-10-03
Span12 days
Flares by day
7
5
2
3
2
3
9
1
2
3
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1988-09-27 | 07:13 | 07:19 | 20 | C5.7 | S28E68 | 5171 |
| 1988-09-27 | 08:50 | 08:50 | 14 | C3.1 | S27E62 | 5171 |
| 1988-09-27 | 09:50 | 09:56 | 53 | M1.6 | S23E63 | 5171 |
| 1988-09-27 | 16:07 | 16:16 | 70 | M7.9 | S27E65 | 5171 |
| 1988-09-27 | 19:38 | 19:41 | 20 | C4.7 | S25E53 | 5171 |
| 1988-09-27 | 22:06 | 22:07 | 15 | C2.7 | S23E59 | 5171 |
| 1988-09-27 | 23:40 | 23:41 | 7 | C1.3 | S28E58 | 5171 |
| 1988-09-28 | 12:12 | 12:16 | 73 | C2.9 | S25E59 | 5171 |
| 1988-09-28 | 14:31 | 14:32 | 16 | C2.5 | S24E56 | 5171 |
| 1988-09-28 | 19:02 | 19:03 | 12 | C1.8 | S25E49 | 5171 |
| 1988-09-28 | 19:57 | 20:01 | 13 | C1.6 | S26E50 | 5171 |
| 1988-09-28 | 22:55 | 23:08 | 74 | M5.7 | S27E48 | 5171 |
| 1988-09-29 | 05:44 | 06:01 | 59 | M1.1 | S27E48 | 5171 |
| 1988-09-29 | 13:11 | 13:14 | 16 | C1.2 | S26E46 | 5171 |
| 1988-09-30 | 01:40 | 01:43 | 30 | C3.8 | S27E34 | 5171 |
| 1988-09-30 | 04:55 | 05:08 | 46 | C5.7 | S26E31 | 5171 |
| 1988-09-30 | 19:00 | 19:12 | 121 | M1.7 | S27E25 | 5171 |
| 1988-10-01 | 10:00 | 10:06 | 67 | C4.4 | S27E20 | 5171 |
| 1988-10-01 | 19:35 | 19:36 | 21 | C5.4 | S27E11 | 5171 |
| 1988-10-02 | 00:50 | 00:54 | 14 | C4.4 | S27E04 | 5171 |
| 1988-10-02 | 04:17 | 04:26 | 20 | C9.4 | S28E02 | 5171 |
| 1988-10-02 | 17:28 | 17:41 | 31 | C4.0 | S26E07 | 5171 |
| 1988-10-03 | 05:25 | 05:27 | 24 | C7.3 | S28W11 | 5171 |
| 1988-10-03 | 09:36 | 09:36 | 3 | C1.8 | S26W15 | 5171 |
| 1988-10-03 | 10:44 | 10:44 | 18 | C4.0 | S25W10 | 5171 |
| 1988-10-03 | 13:22 | 13:26 | 17 | M1.9 | S28W15 | 5171 |
| 1988-10-03 | 14:53 | 15:11 | 49 | X3.2 | S27W16 | 5171 |
| 1988-10-03 | 19:13 | 19:16 | 19 | C7.6 | S28W18 | 5171 |
| 1988-10-03 | 20:54 | 20:57 | 14 | C7.5 | S29W17 | 5171 |
| 1988-10-03 | 22:32 | 22:36 | 19 | M1.0 | S26W19 | 5171 |
| 1988-10-03 | 23:22 | 23:34 | 57 | X1.1 | S27W20 | 5171 |
| 1988-10-04 | 02:54 | 03:02 | 27 | C9.7 | S26W24 | 5171 |
| 1988-10-05 | 06:21 | – | 11 | M3.3 | S23W36 | 5171 |
| 1988-10-05 | 21:43 | 21:46 | 20 | C2.7 | S21W43 | 5171 |
| 1988-10-06 | 01:24 | 01:28 | 26 | M1.6 | S27W46 | 5171 |
| 1988-10-06 | 16:29 | 16:37 | 57 | C9.5 | S27W52 | 5171 |
| 1988-10-06 | 18:13 | 18:14 | 73 | C3.0 | S29W66 | 5171 |
| 1988-10-08 | 21:49 | 21:56 | 24 | C4.1 | S27W89 | 5171 |
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 5171 produced 38 C+ flares between 1988-09-27 and 1988-10-08.