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Solar flares in July 1999
C-class199
M-class23
X-class0
LargestM5.81999-07-19
Sunspot number169.2NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| July 1998 | 68 | 3 | 0 | M4.6 |
| July 1999 | 199 | 23 | 0 | M5.8 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1999-07-19 | 08:16 | 08:46 | 54 | M5.8 | N18E59 | – |
| 1999-07-29 | 19:31 | 19:36 | 9 | M5.1 | N25E51 | 8651 |
| 1999-07-24 | 07:49 | 08:02 | 36 | M3.3 | S28E78 | 8636 |
| 1999-07-16 | 15:42 | 15:50 | 12 | M3.1 | N43W71 | – |
| 1999-07-27 | 12:58 | 14:05 | 82 | M3.0 | N23W50 | 8636 |
| 1999-07-02 | 01:29 | 01:38 | 18 | M2.5 | S27E05 | 8614 |
| 1999-07-25 | 13:08 | 13:38 | 69 | M2.4 | N38W81 | 8639 |
| 1999-07-28 | 08:04 | 08:14 | 15 | M2.3 | S15E03 | – |
| 1999-07-24 | 11:19 | 11:22 | 9 | M2.1 | – | – |
| 1999-07-24 | 11:29 | 11:33 | 10 | M2.0 | – | – |
| 1999-07-01 | 23:24 | 23:31 | 10 | M1.7 | S15W27 | 8603 |
| 1999-07-24 | 03:56 | 04:04 | 12 | M1.7 | S29E87 | – |
| 1999-07-30 | 15:09 | 15:20 | 17 | M1.7 | S15W28 | 8649 |
| 1999-07-02 | 15:12 | 15:20 | 18 | M1.6 | S27E01 | 8611 |
| 1999-07-29 | 16:22 | 16:56 | 55 | M1.3 | S23E08 | 8645 |
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
222 flares of class C or larger in July 1999; by M/X count it ranks 140 of 565 months.