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X0.3 solar flare on 1978-07-09
ClassX0.3NOAA report
Peak00:331978-07-09 UTC
Duration98 min
Peak flux3.0e-05W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 441 / 491 |
| Rank in year | 4 / 1141 |
| Other M/X flares that day | 4 |
| M/X flares that month | 38 |
| Solar cycle | Cycle 21 |
| Position on disk | N19E68 |
| Active region | AR 1203 (78 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 |
|---|---|---|---|---|---|---|
| 10:10 | 10:16 | 14 | M0.1 | N19E72 | 1203 | |
| 12:58 | 14:24 | 153 | M0.3 | N19E68 | 1203 | |
| 15:42 | 16:14 | 32 | M0.2 | N19E68 | 1203 | |
| 17:35 | 17:41 | 65 | M0.1 | S18E37 | 1197 |
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 1978-05-28X0.3 1978-07-10 →
About this page
A X0.3 flare that began 1978-07-09 00:01 UTC; No. 4 of 1,141 C-class-or-larger flares in 1978.