Daily Sunspot Evaluation
Observation Sheet Wednesday, 11 October 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)
- 21
- Relative number (R)
- 61
- Observer
- FA
- Reading
- all checks consistent
- File
- 19721011.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 11 | 62E | 136 | |||
| 2 | B – 12 | -1 | 60W | 258 | |||
| 3 | A – 7 | 9 | 63W | 261 | |||
| 4 | J – 1 | 18 | 76W | 274 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.