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Solar flares in April 1997
C-class9
M-class1
X-class0
LargestM1.91997-04-01
Sunspot number24.5NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| April 1996 | 4 | 1 | 0 | M3.6 |
| April 1997 | 9 | 1 | 0 | M1.9 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1997-04-01 | 13:25 | 13:48 | 36 | M1.9 | S25E16 | – |
| 1997-04-07 | 13:50 | 14:07 | 29 | C6.8 | S30E19 | – |
| 1997-04-01 | 07:52 | 07:59 | 12 | C2.2 | S25E20 | – |
| 1997-04-02 | 00:28 | 00:40 | 15 | C2.2 | S27E09 | – |
| 1997-04-01 | 10:23 | 10:32 | 15 | C2.1 | – | – |
| 1997-04-09 | 10:50 | 11:40 | 60 | C1.5 | – | – |
| 1997-04-02 | 05:24 | 05:32 | 13 | C1.3 | S25E05 | – |
| 1997-04-03 | 12:30 | 13:27 | 98 | C1.2 | – | – |
| 1997-04-14 | 07:58 | 08:42 | 56 | C1.2 | – | – |
| 1997-04-15 | 14:00 | 14:20 | 26 | C1.0 | – | – |
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
10 flares of class C or larger in April 1997; by M/X count it ranks 421 of 565 months.