Daily Sunspot Evaluation
Observation Sheet Monday, 7 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)
- 4
- Number of spots (f)
- 34
- Relative number (R)
- 74
- Observer
- AT
- Reading
- all checks consistent
- File
- 19690407.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 8 | 9 | 21E | 195 | |||
| 2 | J – 1 | -19 | 28E | 188 | |||
| 3 | F – 15 | 10 | 61W | 277 | |||
| 4 | C – 10 | 20 | 40W | 256 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.