Daily Sunspot Evaluation
Observation Sheet Saturday, 4 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)
- 5
- Number of spots (f)
- 36
- Relative number (R)
- 86
- Observer
- EH
- Reading
- all checks consistent
- File
- 19700404.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 8 | 29 | 48E | 68 | |||
| 2 | E – 11 | -11 | 64E | 52 | |||
| 3 | E – 11 | -12 | 29E | 87 | |||
| 4 | B – 2 | -35 | 64E | 52 | |||
| 5 | H – 4 | 95 | 47W | 163 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.