Daily Sunspot Evaluation
Observation Sheet Thursday, 10 August 1972
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)
- 3
- Number of spots (f)
- 18
- Relative number (R)
- 48
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720810.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | -10 | 83W | 20 | |||
| 2 | H – 6 | 14 | 73W | 10 | |||
| 3 | B – 11 | 15 | 45W | 342 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.