Daily Sunspot Evaluation
Observation Sheet Wednesday, 1 September 1971
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)
- 3
- Number of spots (f)
- 4
- Relative number (R)
- 34
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710901.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | -3 | 57E | 101 | |||
| 2 | A – 2 | -6 | 41E | 117 | |||
| 3 | J – 1 | -4 | 78W | 236 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.