Daily Sunspot Evaluation
Observation Sheet Thursday, 11 April 1968
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)
- 45
- Relative number (R)
- 105
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19680411.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 13 | 23 | 17°E | 284 | |||
| 2 | E – 10 | 23 | 52°E | 249 | |||
| 3 | ? – 2 | 33 | 75°E | 226 | |||
| 4 | A – 3 | 24 | 52°E | 249 | |||
| 5 | D – 13 | -22 | 32°W | 333 | |||
| 6 | J – 4 | -15 | 78°W | 15 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.