Daily Sunspot Evaluation
Observation Sheet Saturday, 8 April 1972
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)
- 41
- Relative number (R)
- 111
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720408.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 10 | -7 | 54E | 83 | |||
| 2 | B – 6 | -9 | 12E | 125 | |||
| 3 | ? – 1 | -12 | 84E | 53 | |||
| 4 | D – 5 | -15 | 50E | 87 | |||
| 5 | A – 2 | -21 | 06W | 143 | |||
| 6 | D – 10 | -12 | 48W | 185 | |||
| 7 | C – 7 | 8 | 07W | 144 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.