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Solar flares in June 1999
C-class183
M-class17
X-class0
LargestM3.91999-06-04
Sunspot number208.0NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| June 1998 | 68 | 4 | 0 | M1.9 |
| June 1999 | 183 | 17 | 0 | M3.9 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1999-06-04 | 06:52 | 07:03 | 19 | M3.9 | N17W69 | 8552 |
| 1999-06-17 | 16:47 | 17:30 | 52 | M3.6 | – | – |
| 1999-06-29 | 08:13 | 08:21 | 14 | M3.1 | S27E41 | 8611 |
| 1999-06-20 | 15:25 | 15:35 | 20 | M2.9 | N22E71 | – |
| 1999-06-26 | 05:08 | 05:12 | 6 | M2.3 | N23E03 | – |
| 1999-06-30 | 04:33 | 04:46 | 22 | M2.1 | S26E28 | 8611 |
| 1999-06-30 | 18:03 | 18:08 | 13 | M2.0 | S13W05 | – |
| 1999-06-30 | 11:24 | 11:30 | 14 | M1.9 | S15E00 | 8603 |
| 1999-06-22 | 17:37 | 18:29 | 77 | M1.7 | – | – |
| 1999-06-23 | 06:49 | 07:09 | 46 | M1.7 | N23E42 | 8598 |
| 1999-06-29 | 19:07 | 19:13 | 13 | M1.6 | S14E01 | – |
| 1999-06-29 | 05:01 | 05:10 | 16 | M1.4 | N18E07 | – |
| 1999-06-23 | 23:06 | 23:16 | 19 | M1.1 | – | – |
| 1999-06-30 | 20:07 | 20:12 | 8 | M1.1 | – | 8606 |
| 1999-06-03 | 06:40 | 06:44 | 10 | M1.0 | S15W08 | – |
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
200 flares of class C or larger in June 1999; by M/X count it ranks 177 of 565 months.