Daily Sunspot Evaluation
Observation Sheet Thursday, 14 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)
- 17
- Relative number (R)
- 57
- Observer
- HA
- Reading
- all checks consistent
- File
- 19711014.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | 12 | 14E | 295 | |||
| 2 | A – 1 | 18 | 50E | 259 | |||
| 3 | A – 2 | -11 | 35E | 274 | |||
| 4 | B – 11 | -13 | 20W | 329 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.