Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 3221
C18
M13
X1
LargestX1.71981-07-17
Span13 days
Flares by day
2
8
2
2
2
1
4
2
2
1
4
1
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1981-07-17 | 07:53 | 08:09 | 37 | X1.7 | – | 3221 |
| 1981-07-17 | 23:53 | 23:55 | 8 | C3.5 | S08E83 | 3221 |
| 1981-07-18 | 04:59 | 05:06 | 15 | C4.0 | – | 3221 |
| 1981-07-18 | 07:03 | 07:08 | 53 | M1.8 | S08E77 | 3221 |
| 1981-07-18 | 11:09 | 11:13 | 25 | C5.1 | S10E80 | 3221 |
| 1981-07-18 | 12:20 | 12:24 | 6 | C9.8 | – | 3221 |
| 1981-07-18 | 13:03 | 13:17 | 21 | M1.1 | – | 3221 |
| 1981-07-18 | 15:32 | 16:01 | 63 | M2.2 | S07E73 | 3221 |
| 1981-07-18 | 20:23 | 20:56 | 69 | M1.0 | S08E71 | 3221 |
| 1981-07-18 | 20:50 | 20:58 | 37 | M4.1 | – | 3221 |
| 1981-07-19 | 01:53 | 02:00 | 90 | M3.3 | S09E66 | 3221 |
| 1981-07-19 | 04:08 | 04:30 | 43 | M9.1 | S08E66 | 3221 |
| 1981-07-20 | 07:20 | 07:20 | 18 | C2.5 | S08E53 | 3221 |
| 1981-07-20 | 21:56 | 22:05 | 16 | C3.3 | – | 3221 |
| 1981-07-21 | 13:15 | 13:15 | 19 | M2.5 | S07E35 | 3221 |
| 1981-07-21 | 19:08 | 19:10 | 13 | M1.0 | S06E32 | 3221 |
| 1981-07-22 | 01:31 | 01:43 | 23 | M1.0 | – | 3221 |
| 1981-07-23 | 04:43 | 04:49 | 13 | C9.1 | – | 3221 |
| 1981-07-23 | 07:10 | 07:11 | 56 | C2.6 | S08E13 | 3221 |
| 1981-07-23 | 13:41 | 13:41 | 10 | C2.2 | S06E06 | 3221 |
| 1981-07-23 | 18:52 | 19:46 | 278 | M1.3 | S07E04 | 3221 |
| 1981-07-24 | 16:36 | 16:39 | 44 | C4.2 | S13W06 | 3221 |
| 1981-07-24 | 22:42 | 22:43 | 6 | C1.9 | S07W12 | 3221 |
| 1981-07-25 | 14:02 | 14:04 | 17 | C6.1 | S07W20 | 3221 |
| 1981-07-25 | 23:37 | 23:48 | 23 | C3.4 | S04W23 | 3221 |
| 1981-07-26 | 08:20 | 08:46 | 72 | M2.4 | S09W33 | 3221 |
| 1981-07-27 | 00:14 | 00:19 | 8 | C6.3 | – | 3221 |
| 1981-07-27 | 04:09 | 04:14 | 28 | M1.4 | S07W42 | 3221 |
| 1981-07-27 | 14:49 | 14:56 | 8 | C4.3 | S03W46 | 3221 |
| 1981-07-27 | 15:41 | 15:47 | 15 | C2.0 | S02W45 | 3221 |
| 1981-07-28 | 01:38 | 01:43 | 17 | C3.9 | S07W53 | 3221 |
| 1981-07-29 | 02:42 | 02:45 | 23 | C4.6 | S08W62 | 3221 |
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 3221 produced 32 C+ flares between 1981-07-17 and 1981-07-29.