Daily Sunspot Evaluation
Observation Sheet Wednesday, 11 September 1974
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 6
- Number of spots (f)
- 29
- Relative number (R)
- 89
- Observer
- FA
- Reading
- all checks consistent
- File
- 19740911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 12 | 7 | 55E | 265 | |||
| 2 | A – 1 | -9 | 50E | 270 | |||
| 3 | D – 5 | -14 | 59E | 261 | |||
| 4 | J – 2 | -3 | 27W | 347 | |||
| 5 | J – 1 | -7 | 62W | 22 | |||
| 6 | D – 8 | 8 | 59W | 19 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.