Daily Sunspot Evaluation
Observation Sheet Friday, 1 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)
- 9
- Number of spots (f)
- 72
- Relative number (R)
- 162
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720901.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 22 | 17 | 18E | 348 | |||
| 2 | B – 15 | 17 | 31E | 335 | |||
| 3 | A – 6 | -8 | 47E | 319 | |||
| 4 | B – 9 | -5 | 14W | 20 | |||
| 5 | J – 1 | -6 | 31W | 37 | |||
| 6 | H – 1 | -14 | 74W | 80 | |||
| 7 | ? – 3 | -8 | 80W | 86 | |||
| 8 | B – 11 | 14 | 09W | 15 | |||
| 9 | J – 4 | 15 | 01W | 7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.