Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 5871
C5
M5
X0
LargestM2.51990-01-09
Span4 days
Flares by day
3
5
1
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1990-01-09 | 07:01 | 07:03 | 9 | C5.1 | S25W18 | 5871 |
| 1990-01-09 | 14:51 | 14:53 | 46 | M2.5 | S25W19 | 5871 |
| 1990-01-09 | 20:40 | 20:41 | 24 | M1.2 | S25W22 | 5871 |
| 1990-01-10 | 00:30 | 00:34 | 26 | C1.2 | S26W23 | 5871 |
| 1990-01-10 | 02:41 | 02:44 | 31 | M2.2 | S26W24 | 5871 |
| 1990-01-10 | 07:38 | 07:42 | 9 | C3.0 | S22W30 | 5871 |
| 1990-01-10 | 13:00 | 13:02 | 10 | C4.6 | S22W34 | 5871 |
| 1990-01-10 | 20:17 | 20:20 | 43 | M2.0 | S25W35 | 5871 |
| 1990-01-11 | 20:44 | 20:50 | 32 | C2.4 | S25W49 | 5871 |
| 1990-01-12 | 00:45 | 00:56 | 49 | M1.1 | S25W50 | 5871 |
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 5871 produced 10 C+ flares between 1990-01-09 and 1990-01-12.