Daily Sunspot Evaluation
Observation Sheet Thursday, 12 April 1962
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)
- 20
- Relative number (R)
- 50
- Observer
- FY
- Reading
- all checks consistent
- File
- 19620412.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 13 | 10 | 28E | ||||
| 2 | ? – 1 | 7 | 83E | ||||
| 3 | D – 6 | -8 | 72E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.