Daily Sunspot Evaluation
Observation Sheet Wednesday, 31 October 1951
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)
- 64
- Relative number (R)
- 104
- Observer
- ET
- Reading
- all checks consistent
- File
- 19511031.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 6 | 0.31 | 86 | |
| 2 | A – 1 | 0.56 | 128 | |
| 3 | E – 50 | 0.33 | 170 | |
| 4 | ? – 7 | 0.97 | 303 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.