Daily Sunspot Evaluation
Observation Sheet Saturday, 15 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)
- 5
- Number of spots (f)
- 12
- Relative number (R)
- 62
- Observer
- SB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19670415.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 1 | 25 | 53E | 345 | |||
| 2 | ? – 4 | 14 | 74W | 119 ⚠ | |||
| 3 | ? – 3 | 24 | 80W | 118 | |||
| 4 | A – 2 | 17 | 22W | 60 | |||
| 5 | ? – 2 | 15 | 17W | 55 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.