Daily Sunspot Evaluation
Observation Sheet Friday, 28 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)
- 7
- Number of spots (f)
- 59
- Relative number (R)
- 129
- Observer
- DK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19670428.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 13 | 45E | 192 ⚠ | |||
| 2 | ? – 6 | -21 | 75E | 152 | |||
| 3 | C – 12 | -11 | 21E | 206 | |||
| 4 | A – 1 | -25 | 65W | 292 | |||
| 5 | J – 1 | 23 | 66W | 293 | |||
| 6 | B – 4 | 32 | 20W | 247 | |||
| 7 | C – 34 | 27 | 05W | 232 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.