Daily Sunspot Evaluation
Observation Sheet Saturday, 25 April 1970
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)
- 33
- Relative number (R)
- 103
- Observer
- EH
- Reading
- all checks consistent
- File
- 19700425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 5 | 9 | 09E | 192 | |||
| 2 | ? – 2 | 19 | 68E | 133 | |||
| 3 | ? – 1 | -9 | 80E | 121 | |||
| 4 | D – 17 | -9 | 28W | 229 | |||
| 5 | J – 1 | -9 | 78W | 279 | |||
| 6 | H – 1 | 4 | 72W | 273 | |||
| 7 | D – 6 | 9 | 30W | 231 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.