Daily Sunspot Evaluation
Observation Sheet Wednesday, 12 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)
- 4
- Number of spots (f)
- 14
- Relative number (R)
- 54
- Observer
- SK
- Reading
- all checks consistent
- File
- 19670412.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 15 | 23E | 55 | |||
| 2 | G – 3 | -24 | 52W | 130 | |||
| 3 | ? – 3 | -20 | 76W | 153 | |||
| 4 | D – 7 | 23 | 32W | 110 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.