Daily Sunspot Evaluation
Observation Sheet Tuesday, 10 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)
- 27
- Relative number (R)
- 87
- Observer
- FA
- Reading
- all checks consistent
- File
- 19740910.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 9 | 7 | 68E | 264 | |||
| 2 | D – 5 | -14 | 72E | 260 | |||
| 3 | A – 2 | -20 | 04W | 336 | |||
| 4 | J – 2 | -3 | 14W | 346 | |||
| 5 | J – 1 | -7 | 49W | 21 | |||
| 6 | C – 8 | 8 | 46W | 18 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.