Daily Sunspot Evaluation
Observation Sheet Thursday, 10 January 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)
- 4
- Number of spots (f)
- 20
- Relative number (R)
- 60
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740110.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 11 | 50E | 249 | |||
| 2 | H – 5 | -11 | 51E | 248 | |||
| 3 | ? – 1 | -15 | 81E | 218 | |||
| 4 | D – 13 | 7 | 12W | 311 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.