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X1.4 solar flare on 1991-03-05
ClassX1.4NOAA report
Peak17:181991-03-05 UTC
Duration32 min
Peak flux1.4e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 290 / 491 |
| Rank in year | 37 / 3297 |
| Other M/X flares that day | 6 |
| M/X flares that month | 123 |
| Solar cycle | Cycle 22 |
| Position on disk | S09E69 |
| Active region | AR 6537 (7 flares) |
Compared with the strongest flares of 1991
X12.0
X12.0
X12.0
X12.0
X12.0
X10.0
X10.0
X9.4
X7.1
X6.1
X5.5
X5.3
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 02:19 | 02:26 | 41 | M1.5 | – | – | |
| 02:56 | 03:12 | 29 | X1.5 | S23E88 | 6538 | |
| 04:58 | 05:06 | 47 | M9.3 | – | – | |
| 06:15 | 06:28 | 18 | M1.4 | – | – | |
| 09:10 | 09:16 | 35 | X2.0 | S19E93 | 6538 | |
| 23:26 | 23:26 | 19 | M6.2 | S23E79 | 6538 |
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.
← X2.0 1991-03-05M6.2 1991-03-05 →
About this page
A X1.4 flare that began 1991-03-05 17:16 UTC; No. 37 of 3,297 C-class-or-larger flares in 1991.