Daily Sunspot Evaluation
Observation Sheet Wednesday, 6 January 1971
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)
- 24
- Relative number (R)
- 64
- Observer
- HA
- Reading
- all checks consistent
- File
- 19710106.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 12 | 51E | 6 | |||
| 2 | F – 18 | -5 | 52E | 5 | |||
| 3 | H – 4 | 3 | 31W | 88 | |||
| 4 | J – 1 | 22 | 40W | 97 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.