Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 9906
C9
M2
X1
LargestX1.52002-04-21
Span11 days
Flares by day
2
1
1
1
1
4
1
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2002-04-12 | 01:42 | 01:46 | 11 | C1.8 | S12E36 | 9906 |
| 2002-04-12 | 08:39 | 08:42 | 5 | C3.0 | S15E33 | 9906 |
| 2002-04-13 | 15:15 | 15:25 | 18 | C1.9 | S15E16 | 9906 |
| 2002-04-14 | 13:37 | 13:50 | 38 | C3.8 | S16E04 | 9906 |
| 2002-04-15 | 03:05 | 03:55 | 121 | M1.2 | S15W01 | 9906 |
| 2002-04-17 | 07:46 | 08:24 | 131 | M2.6 | S14W34 | 9906 |
| 2002-04-19 | 06:46 | 06:49 | 6 | C1.7 | S15W57 | 9906 |
| 2002-04-19 | 07:50 | 07:54 | 7 | C2.0 | S16W54 | 9906 |
| 2002-04-19 | 15:16 | 15:21 | 11 | C2.5 | S16W59 | 9906 |
| 2002-04-19 | 18:14 | 18:22 | 32 | C3.4 | S16W57 | 9906 |
| 2002-04-21 | 00:43 | 01:51 | 115 | X1.5 | S14W84 | 9906 |
| 2002-04-22 | 00:03 | 00:19 | 18 | C7.7 | – | 9906 |
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 9906 produced 12 C+ flares between 2002-04-12 and 2002-04-22.