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X1.0 solar flare on 1981-07-26
ClassX1.0NOAA report
Peak08:071981-07-26 UTC
Duration35 min
Peak flux1.0e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 397 / 491 |
| Rank in year | 35 / 4022 |
| Other M/X flares that day | 13 |
| M/X flares that month | 74 |
| Solar cycle | Cycle 21 |
| Position on disk | S14W18 |
| Active region | AR 3234 (84 flares) |
Compared with the strongest flares of 1981
X5.9
X5.5
X4.0
X3.6
X3.5
X3.1
X3.0
X2.7
X2.6
X2.5
X2.4
X2.3
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 04:00 | 04:12 | 43 | M2.8 | S12E31 | 3234 | |
| 05:55 | 06:06 | 19 | M1.8 | S14E30 | 3234 | |
| 08:20 | 08:46 | 72 | M2.4 | S09W33 | 3221 | |
| 10:02 | 10:04 | 40 | M2.1 | S15E29 | 3234 | |
| 11:09 | 11:16 | 259 | M4.0 | S14E29 | 3234 | |
| 11:54 | 11:56 | 27 | M1.2 | S15E29 | 3234 | |
| 13:44 | 13:54 | 40 | X3.5 | S15E27 | 3234 | |
| 15:29 | 15:34 | 34 | M2.1 | S15E26 | 3234 | |
| 18:06 | 18:18 | 58 | M1.4 | S14E24 | 3234 | |
| 19:09 | 19:20 | 30 | M1.4 | – | 3234 | |
| 21:27 | 21:31 | 50 | M9.9 | S12E22 | 3234 | |
| 23:20 | 23:50 | 39 | M1.0 | S15E22 | 3234 | |
| 23:46 | 23:49 | 10 | M2.1 | – | 3234 |
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.
← M5.4 1981-07-20X3.5 1981-07-26 →
About this page
A X1.0 flare that began 1981-07-26 07:57 UTC; No. 35 of 4,022 C-class-or-larger flares in 1981.