Daily Sunspot Evaluation
Observation Sheet Friday, 25 December 1970
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)
- 7
- Number of spots (f)
- 43
- Relative number (R)
- 113
- Observer
- SM
- Reading
- all checks consistent
- File
- 19701225.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 7 | 19 | 03E | 214 | |||
| 2 | H – 1 | 16 | 64E | 153 | |||
| 3 | C – 11 | -9 | 10W | 227 | |||
| 4 | C – 12 | 13 | 68W | 285 | |||
| 5 | G – 3 | 20 | 80W | 297 | |||
| 6 | A – 2 | 24 | 75W | 292 | |||
| 7 | B – 7 | 27 | 19W | 236 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.