Daily Sunspot Evaluation
Observation Sheet Sunday, 30 April 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)
- 6
- Number of spots (f)
- 75
- Relative number (R)
- 135
- Observer
- SK
- Reading
- all checks consistent
- File
- 19610430.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 31 | 4 | 3E | ||||
| 2 | J – 1 | 12 | 35E | ||||
| 3 | A – 1 | -8 | 7W | ||||
| 4 | E – 33 | -10 | 5E | ||||
| 5 | B – 4 | -22 | 6E | ||||
| 6 | B – 5 | 6 | 43W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.