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X0.2 solar flare on 1978-12-12
ClassX0.2NOAA report
Peak15:141978-12-12 UTC
Duration93 min
Peak flux2.0e-05W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 452 / 491 |
| Rank in year | 10 / 1141 |
| Other M/X flares that day | 6 |
| M/X flares that month | 32 |
| Solar cycle | Cycle 21 |
| Position on disk | S19W73 |
| Active region | AR 1447 (19 flares) |
Compared with the strongest flares of 1978
X1.5
M5.0
M3.0
M3.0
M3.0
M2.0
M2.0
M2.0
M2.0
M2.0
M2.0
M1.0
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 05:25 | 05:27 | 12 | M0.1 | S16W55 | 1447 | |
| 06:45 | 06:46 | 10 | M0.1 | S17W54 | 1447 | |
| 17:26 | 18:36 | 74 | M0.1 | S19W74 | 1447 | |
| 18:36 | 18:36 | 24 | X0.1 | S17W64 | 1447 | |
| 20:12 | 20:12 | 11 | X0.2 | S15E01 | 1444 | |
| 20:53 | 20:53 | 3 | M0.1 | S18W65 | 1447 |
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.
← X0.1 1978-12-11X0.1 1978-12-12 →
About this page
A X0.2 flare that began 1978-12-12 15:03 UTC; No. 10 of 1,141 C-class-or-larger flares in 1978.