Daily Sunspot Evaluation
Observation Sheet Thursday, 25 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)
- 5
- Number of spots (f)
- 21
- Relative number (R)
- 71
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19680425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 1 | 5°E | 111 | |||
| 2 | ? – 1 | -15 | 75°E | 37 | |||
| 3 | C – 8 | 15 | 32°W | 148 | |||
| 4 | C – 10 | 16 | 21°W | 137 | |||
| 5 | J – 1 | -24 | 46°E | 70 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.