Daily Sunspot Evaluation
Observation Sheet Saturday, 16 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)
- 9
- Relative number (R)
- 39
- Observer
- MA
- Reading
- all checks consistent
- File
- 19711016.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 6 | 8 | 75°E | 208 | |||
| 2 | A – 1 | -12 | 51°W | 334 | |||
| 3 | A – 2 | 12 | 15°W | 298 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.