Daily Sunspot Evaluation
Observation Sheet Sunday, 23 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)
- 13
- Number of spots (f)
- 68
- Relative number (R)
- 198
- Observer
- LT
- Reading
- all checks consistent
- File
- 19670423.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 17 | 9°E | 282 | |||
| 2 | B – 3 | 14 | 10°E | 281 | |||
| 3 | ? – 8 | 27 | 60°E | 231 | |||
| 4 | B – 19 | -14 | 16°E | 275 | |||
| 5 | B – 4 | -20 | 24°E | 264 | |||
| 6 | A – 4 | -25 | 30°E | 282 | |||
| 7 | H – 11 | -23 | 1°W | 292 | |||
| 8 | B – 3 | -45 | 6°W | 297 | |||
| 9 | ? – 6 | -22 | 74°W | 6 | |||
| 10 | H – 5 | 26 | 50°W | 341 | |||
| 11 | A – 1 | 24 | 11°W | 302 | |||
| 12 | A – 1 | 22 | 5°W | 296 | |||
| 13 | J – 1 | 24 | 1°W | 292 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.