Daily Sunspot Evaluation
Observation Sheet Thursday, 24 July 1975
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)
- 10
- Relative number (R)
- 40
- Observer
- FA
- Reading
- all checks consistent
- File
- 19750724.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 7 | 9 | 29E | 83 | 24E | ||
| 2 | ? – 2 | 7 | 43E | 67 | 40E | ||
| 3 | ? – 1 | -5 | 60W | 170 | 63W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.