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X10.1 solar flare on 1984-05-20
ClassX10.1NOAA report
Peak22:411984-05-20 UTC
Duration139 min
Peak flux1.0e-03W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 18 / 491 |
| Rank in year | 2 / 1262 |
| Other M/X flares that day | 5 |
| M/X flares that month | 26 |
| Solar cycle | Cycle 21 |
| Position on disk | S09E52 |
| Active region | AR 4492 (58 flares) |
Compared with the strongest flares of 1984
X13.0
X10.1
X4.1
X2.7
X2.3
X1.7
X1.0
M7.5
M7.2
M7.1
M6.3
M5.7
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 01:26 | 01:27 | 37 | M2.9 | S10E65 | 4492 | |
| 02:46 | 03:03 | 40 | M4.6 | S08E64 | 4492 | |
| 04:02 | 04:08 | 16 | M1.0 | – | 4492 | |
| 05:29 | 05:43 | 32 | M5.4 | – | 4492 | |
| 06:16 | 06:20 | 9 | M1.2 | – | 4492 |
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 1984-05-20M5.7 1984-05-21 →
About this page
A X10.1 flare that began 1984-05-20 22:18 UTC; No. 2 of 1,262 C-class-or-larger flares in 1984.