Daily Sunspot Evaluation
Observation Sheet Wednesday, 22 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)
- 6
- Number of spots (f)
- 47
- Relative number (R)
- 107
- Observer
- SK
- Reading
- all checks consistent
- File
- 19700422.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 4 | 20 | 19E | 222 | |||
| 2 | A – 4 | 20 | 25E | 216 | |||
| 3 | C – 15 | -9 | 10E | 231 | |||
| 4 | G – 4 | -7 | 35W | 276 | |||
| 5 | D – 18 | 2 | 37W | 278 | |||
| 6 | A – 2 | 18 | 21W | 262 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.