Daily Sunspot Evaluation
Observation Sheet Thursday, 3 April 1969
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)
- 6
- Number of spots (f)
- 139
- Relative number (R)
- 199
- Observer
- SM
- Reading
- all checks consistent
- File
- 19690403.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 20 | 19 | 13E | 256 | |||
| 2 | D – 21 | 22 | 24E | 245 | |||
| 3 | H – 3 | 9 | 75E | 194 | |||
| 4 | C – 11 | -9 | 64W | 333 | |||
| 5 | C – 18 | 24 | 37W | 306 | |||
| 6 | F – 66 | 10 | 07W | 278 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.