Daily Sunspot Evaluation
Observation Sheet Wednesday, 1 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)
- 9
- Number of spots (f)
- 58
- Relative number (R)
- 148
- Observer
- SK
- Reading
- all checks consistent
- File
- 19700401.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 6 | -12 | 73E | 85 | |||
| 2 | A – 2 | -18 | 08E | 150 | |||
| 3 | A – 2 | -12 | 24W | 182 | |||
| 4 | B – 2 | -8 | 75W | 233 | |||
| 5 | C – 7 | -2 | 30W | 188 | |||
| 6 | ? – 1 | 12 | 77W | 235 | |||
| 7 | B – 3 | 21 | 64W | 222 | |||
| 8 | C – 10 | 4 | 17W | 175 | |||
| 9 | D – 25 | 4 | 03W | 161 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.