Daily Sunspot Evaluation
Observation Sheet Tuesday, 31 July 1956
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)
- 10
- Number of spots (f)
- 52
- Relative number (R)
- 152
- Observer
- MH
- Reading
- all checks consistent
- File
- 19560731.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 5 | 24 | 50E | ||||
| 2 | ? – 4 | 18 | 75E | ||||
| 3 | ? – 1 | 13 | 78E | ||||
| 4 | C – 15 | -14 | 20E | ||||
| 5 | C – 10 | -30 | 31E | ||||
| 6 | A – 3 | -26 | 21E | ||||
| 7 | A – 2 | -24 | 11E | ||||
| 8 | G – 6 | -22 | 51W | ||||
| 9 | J – 1 | 26 | 77W | ||||
| 10 | B – 5 | 26 | 1W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.