Daily Sunspot Evaluation
Observation Sheet Monday, 31 July 1967
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)
- 6
- Number of spots (f)
- 101
- Relative number (R)
- 161
- Observer
- SM
- Reading
- all checks consistent
- File
- 19670731.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 14 | 20 | 23E | 41 | |||
| 2 | C – 7 | 12 | 9E | 55 | |||
| 3 | J – 1 | -22 | 35E | 29 | |||
| 4 | F – 22 | 14 | 21W | 85 | |||
| 5 | F – 42 | 27 | 34W | 98 | |||
| 6 | C – 15 | 18 | 6W | 70 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.