Daily Sunspot Evaluation
Observation Sheet Tuesday, 31 January 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)
- 38
- Relative number (R)
- 78
- Observer
- ET
- Reading
- all checks consistent
- File
- 19610131.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 5 | 23 | 37E | ||||
| 2 | A – 1 | -17 | 71E | ||||
| 3 | D – 6 | 7 | 68W | ||||
| 4 | H – 26 | 9 | 2W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.