Daily Sunspot Evaluation
Observation Sheet Monday, 4 October 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)
- 4
- Number of spots (f)
- 23
- Relative number (R)
- 63
- Observer
- FA
- Reading
- all checks consistent
- File
- 19711004.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 11 | 14 | 03E | 79 | |||
| 2 | A – 2 | -12 | 12W | 94 | |||
| 3 | B – 7 | -5 | 37W | 119 | |||
| 4 | H – 3 | -5 | 51W | 133 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.