Daily Sunspot Evaluation
Observation Sheet Tuesday, 25 July 1961
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)
- 36
- Relative number (R)
- 76
- Observer
- ET
- Reading
- all checks consistent
- File
- 19610725.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 0 | 64E | ||||
| 2 | B – 5 | 1 | 28W | ||||
| 3 | D – 9 | 9 | 57W | ||||
| 4 | E – 21 | 8 | 1W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.