Daily Sunspot Evaluation
Observation Sheet Sunday, 10 September 1972
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)
- 32
- Relative number (R)
- 72
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720910.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 9 | 20 | 07E | 239 | |||
| 2 | D – 11 | -12 | 63E | 183 | |||
| 3 | ? – 1 | -8 | 80W | 326 | |||
| 4 | A – 11 | 11 | 58W | 304 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.