Daily Sunspot Evaluation
Observation Sheet Sunday, 31 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)
- 6
- Number of spots (f)
- 95
- Relative number (R)
- 155
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19710131.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 47 | 7 | 25E | 65 | |||
| 2 | ? – 1 | -6 | 76E | 14 | |||
| 3 | G – 6 | -22 | 65E | 25 | |||
| 4 | C – 24 | -12 | 11W | 101 | |||
| 5 | A – 2 | 3 | 32W | 122 | |||
| 6 | D – 15 | 9 | 02W | 92 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.