Daily Sunspot Evaluation
Observation Sheet Monday, 13 April 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)
- 10
- Number of spots (f)
- 66
- Relative number (R)
- 166
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19700413.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 8 | 21E | 339 | |||
| 2 | ? – 2 | -6 | 79E | 281 | |||
| 3 | J – 5 | -8 | 42E | 318 | |||
| 4 | J – 3 | -22 | 75W | 75 | |||
| 5 | E – 16 | -12 | 54W | 54 | |||
| 6 | ? – 1 | -16 | 85W | 85 | |||
| 7 | A – 2 | 5 | 71W | 71 | |||
| 8 | J – 1 | -2 | 29W | 29 | |||
| 9 | E – 14 | 10 | 56W | 56 | |||
| 10 | E – 21 | 16 | 05W | 5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.