Daily Sunspot Evaluation
Observation Sheet Wednesday, 11 August 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)
- 35
- Relative number (R)
- 95
- Observer
- FA
- Reading
- all checks consistent
- File
- 19710811.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 4 | 20 | 33E | 41 | |||
| 2 | ? – 2 | 13 | 84E | 350 | |||
| 3 | D – 11 | -12 | 18W | 92 | |||
| 4 | A – 1 | -8 | 17W | 91 | |||
| 5 | H – 3 | -9 | 24W | 98 | |||
| 6 | D – 14 | 12 | 49W | 123 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.