Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 December 1970
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)
- 7
- Number of spots (f)
- 36
- Relative number (R)
- 106
- Observer
- FA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19701215.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 2 | 13 | 62E | 288 | |||
| 2 | H – 6 | 14 | 71E | 273 ⚠ | |||
| 3 | B – 2 | -8 | 54E | 296 | |||
| 4 | A – 1 | -6 | 11W | 1 | |||
| 5 | E – 6 | -6 | 68W | 58 | |||
| 6 | G – 4 | 14 | 44W | 34 | |||
| 7 | D – 15 | 12 | 15W | 5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.