Daily Sunspot Evaluation
Observation Sheet Saturday, 7 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)
- 4
- Number of spots (f)
- 25
- Relative number (R)
- 65
- Observer
- MA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19710807.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 12 | 03E | 119 ⚠ | |||
| 2 | D – 17 | -9 | 29E | 99 | |||
| 3 | H – 2 | -11 | 38E | 90 | |||
| 4 | B – 3 | -16 | 62W | 190 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.