Daily Sunspot Evaluation
Observation Sheet Friday, 31 March 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)
- 5
- Number of spots (f)
- 37
- Relative number (R)
- 87
- Observer
- AK
- Reading
- all checks consistent
- File
- 19610331.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 5 | -17 | 41E | ||||
| 2 | C – 4 | -19 | 20E | ||||
| 3 | H – 20 | -15 | 7E | ||||
| 4 | H – 1 | 8 | 70W | ||||
| 5 | C – 7 | 7 | 56W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.