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X4.7 solar flare on 1991-03-26
ClassX4.7NOAA report
Peak20:341991-03-26 UTC
Duration71 min
Peak flux4.7e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 61 / 491 |
| Rank in year | 13 / 3297 |
| Other M/X flares that day | 1 |
| M/X flares that month | 123 |
| Solar cycle | Cycle 22 |
| Position on disk | S28W23 |
| Active region | AR 6555 (79 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 |
|---|---|---|---|---|---|---|
| 16:14 | 16:27 | 42 | M1.0 | S22W30 | 6555 |
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.
← X5.3 1991-03-25X2.4 1991-03-29 →
About this page
A X4.7 flare that began 1991-03-26 20:26 UTC; No. 13 of 3,297 C-class-or-larger flares in 1991.