Daily Sunspot Evaluation
Observation Sheet Monday, 17 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)
- 10
- Relative number (R)
- 50
- Observer
- DK
- Reading
- all checks consistent
- File
- 19670417.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 5 | 22 | 17°E | 344 | |||
| 2 | ? – 1 | 23 | 90°E | 282 | |||
| 3 | ? – 2 | -22 | 70°E | 292 | |||
| 4 | B – 2 | 13 | 48°W | 60 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.