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Solar flares from active region 6619
C16
M3
X1
LargestX2.81991-05-18
Span13 days
Flares by day
2
1
2
1
3
2
1
1
1
5
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-05-06 | 13:38 | 13:38 | 5 | C2.6 | N30E61 | 6619 |
| 1991-05-06 | 21:24 | 21:24 | 7 | C2.5 | N28E57 | 6619 |
| 1991-05-07 | 15:27 | 15:29 | 29 | C3.1 | N29E47 | 6619 |
| 1991-05-08 | 01:38 | 01:43 | 22 | C5.3 | N27E43 | 6619 |
| 1991-05-08 | 18:23 | 18:43 | 53 | C6.1 | N27E33 | 6619 |
| 1991-05-09 | 14:44 | 15:10 | 61 | C3.5 | N29E27 | 6619 |
| 1991-05-10 | 02:08 | 02:08 | 6 | C5.8 | N34E19 | 6619 |
| 1991-05-10 | 02:54 | 03:46 | 63 | C7.0 | N39E10 | 6619 |
| 1991-05-10 | 13:44 | 13:47 | 10 | C1.9 | N25E13 | 6619 |
| 1991-05-11 | 02:04 | 02:05 | 5 | C3.2 | N30E06 | 6619 |
| 1991-05-11 | 19:54 | 20:25 | 318 | M2.1 | N33W02 | 6619 |
| 1991-05-13 | 15:15 | 15:18 | 9 | C1.7 | N26W24 | 6619 |
| 1991-05-15 | 22:58 | 23:06 | 16 | C1.8 | N30W52 | 6619 |
| 1991-05-16 | 06:35 | 06:54 | 175 | M8.9 | N30W56 | 6619 |
| 1991-05-17 | 04:02 | 04:22 | 24 | C2.6 | N30W69 | 6619 |
| 1991-05-17 | 09:03 | 09:04 | 76 | M3.3 | N29W73 | 6619 |
| 1991-05-17 | 15:41 | 15:46 | 12 | C1.5 | N28W77 | 6619 |
| 1991-05-17 | 21:04 | 21:07 | 15 | C3.0 | N30W78 | 6619 |
| 1991-05-17 | 23:03 | 23:05 | 6 | C5.9 | N31W80 | 6619 |
| 1991-05-18 | 05:06 | 05:46 | 162 | X2.8 | N32W85 | 6619 |
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 6619 produced 20 C+ flares between 1991-05-06 and 1991-05-18.