Daily Sunspot Evaluation
Observation Sheet Friday, 20 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)
- 19
- Relative number (R)
- 49
- Observer
- MH
- Reading
- all checks consistent
- File
- 19620420.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 11 | 7E | ||||
| 2 | ? – 1 | 11 | 73W | ||||
| 3 | F – 16 | 9 | 20W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.