Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 June 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)
- 16
- Relative number (R)
- 56
- Observer
- FA
- Reading
- all checks consistent
- File
- 19710615.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | -9 | 73E | 36 | |||
| 2 | B – 13 | -14 | 15W | 124 | |||
| 3 | ? – 1 | 13 | 85W | 194 | |||
| 4 | A – 1 | 14 | 40W | 149 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.