Daily Sunspot Evaluation
Observation Sheet Saturday, 30 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)
- 3
- Number of spots (f)
- 22
- Relative number (R)
- 52
- Observer
- MA
- Reading
- all checks consistent
- File
- 19711030.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 2 | 12 | 18E | 79 | |||
| 2 | B – 16 | -13 | 10E | 87 | |||
| 3 | H – 4 | -6 | 35W | 132 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.