Daily Sunspot Evaluation
Observation Sheet Sunday, 31 July 1966
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)
- 41
- Relative number (R)
- 101
- Observer
- LT
- Reading
- all checks consistent
- File
- 19660731.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 21 | 11E | 190 | |||
| 2 | G – 15 | 25 | 20E | 181 | |||
| 3 | C – 21 | 27 | 45E | 156 | |||
| 4 | F – 1 | 23 | 55W | 256 | |||
| 5 | F – 1 | 37 | 71W | 272 | |||
| 6 | F – 1 | 35 | 4W | 205 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.