Daily Sunspot Evaluation
Observation Sheet Friday, 3 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)
- 4
- Number of spots (f)
- 30
- Relative number (R)
- 70
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19700403.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 5 | 30 | 65E | 64 | |||
| 2 | E – 20 | -11 | 42E | 87 | |||
| 3 | ? – 2 | -12 | 80E | 49 | |||
| 4 | H – 3 | 5 | 34W | 163 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.