Daily Sunspot Evaluation
Observation Sheet Friday, 13 February 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)
- 62
- Relative number (R)
- 132
- Observer
- MÖ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19700213.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | -6 | 64E | 353 | |||
| 2 | D – 11 | -13 | 55E | 2 | |||
| 3 | A – 2 | -12 | 32E | 25 | |||
| 4 | ? – 3 | -22 | 77E | 340 | |||
| 5 | H – 2 | -21 | 10W | 67 | |||
| 6 | E – 18 | -14 | 14W | 71 | |||
| 7 | F – 25 | 18 | 34W | 31 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.