Daily Sunspot Evaluation
Observation Sheet Monday, 25 October 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)
- 42
- Relative number (R)
- 102
- Observer
- FA
- Reading
- all checks consistent
- File
- 19711025.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 20 | 58E | 107 | |||
| 2 | D – 12 | 12 | 36E | 129 | |||
| 3 | ? – 1 | 11 | 85E | 80 | |||
| 4 | H – 1 | -5 | 31E | 134 | |||
| 5 | F – 19 | 8 | 46W | 211 | |||
| 6 | E – 8 | 18 | 25W | 190 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.