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Solar flares in May 1987
C-class57
M-class2
X-class0
LargestM1.31987-05-25
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| May 1986 | 6 | 1 | 0 | M1.2 |
| May 1987 | 57 | 2 | 0 | M1.3 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1987-05-25 | 03:30 | 03:42 | 33 | M1.3 | N30W49 | 4811 |
| 1987-05-24 | 15:18 | 15:27 | 30 | M1.2 | N28W37 | 4811 |
| 1987-05-19 | 18:08 | 18:10 | 29 | C9.6 | N30E25 | 4811 |
| 1987-05-26 | 19:41 | 19:46 | 29 | C8.1 | N28W70 | 4811 |
| 1987-05-21 | 03:15 | 03:24 | 38 | C7.6 | N23E03 | 4811 |
| 1987-05-01 | 18:58 | 19:03 | 36 | C5.9 | N01W57 | 4797 |
| 1987-05-25 | 18:50 | 18:55 | 36 | C5.9 | N29W56 | 4811 |
| 1987-05-17 | 08:37 | 08:45 | 33 | C4.9 | S21W45 | 4808 |
| 1987-05-22 | 12:36 | 12:38 | 20 | C4.8 | N29W13 | 4811 |
| 1987-05-25 | 16:09 | 16:22 | 57 | C4.2 | N31W54 | 4811 |
| 1987-05-02 | 02:01 | 02:08 | 19 | C3.4 | – | 4797 |
| 1987-05-19 | 12:23 | 12:26 | 11 | C3.2 | S19W71 | 4808 |
| 1987-05-27 | 01:32 | 01:36 | 11 | C2.9 | N22W71 | 4811 |
| 1987-05-26 | 06:10 | 06:16 | 12 | C2.8 | N24W59 | 4811 |
| 1987-05-16 | 09:44 | 09:47 | 5 | C2.7 | – | – |
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
59 flares of class C or larger in May 1987; by M/X count it ranks 386 of 565 months.