Daily Sunspot Evaluation
Observation Sheet Friday, 1 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)
- 6
- Number of spots (f)
- 39
- Relative number (R)
- 99
- Observer
- FA
- Reading
- all checks consistent
- File
- 19711001.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 16 | 42E | 77 | |||
| 2 | G – 13 | 11 | 42E | 77 | |||
| 3 | B – 2 | -8 | 49E | 70 | |||
| 4 | D – 17 | -5 | 00 | 119 | |||
| 5 | H – 5 | -6 | 13W | 132 | |||
| 6 | A – 1 | -15 | 74W | 193 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.