Daily Sunspot Evaluation
Observation Sheet Tuesday, 11 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)
- 32
- Relative number (R)
- 72
- Observer
- SK
- Reading
- all checks consistent
- File
- 19670411.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 11 | 37E | 54 | |||
| 2 | H – 3 | -26 | 37W | 128 | |||
| 3 | E – 12 | -20 | 62W | 153 | |||
| 4 | C – 16 | 23 | 18W | 109 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.