Daily Sunspot Evaluation
Observation Sheet Tuesday, 3 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)
- 7
- Number of spots (f)
- 20
- Relative number (R)
- 90
- Observer
- FA
- Reading
- all checks consistent
- File
- 19710803.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | -8 | 85E | 96 | |||
| 2 | A – 2 | -9 | 36E | 145 | |||
| 3 | C – 9 | -26 | 24E | 157 | |||
| 4 | H – 4 | -13 | 46W | 227 | |||
| 5 | A – 1 | -8 | 62W | 243 | |||
| 6 | B – 2 | 6 | 12W | 193 | |||
| 7 | A – 1 | 11 | 15W | 196 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.