Daily Sunspot Evaluation
Observation Sheet Tuesday, 4 April 1967
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)
- 16
- Relative number (R)
- 76
- Observer
- SK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19670404.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 23 | 11E | 173 | |||
| 2 | ? – 1 | 11 | 30E | 108 ⚠ | |||
| 3 | A – 2 | -24 | 57E | 127 | |||
| 4 | A – 1 | -10 | 28W | 207 ⚠ | |||
| 5 | A – 2 | 33 | 22W | 206 | |||
| 6 | B – 9 | 17 | 6W | 190 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.