Daily Sunspot Evaluation
Observation Sheet Saturday, 11 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)
- 10
- Number of spots (f)
- 104
- Relative number (R)
- 204
- Observer
- EH
- Reading
- all checks consistent
- File
- 19700411.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 27 | 16 | 21°E | 5 | |||
| 2 | J – 2 | -9 | 69°E | 317 | |||
| 3 | F – 39 | -12 | 26°W | 52 | |||
| 4 | J – 5 | -22 | 44°W | 70 | |||
| 5 | J – 1 | -17 | 58°W | 84 | |||
| 6 | G – 3 | 8 | 69°W | 95 | |||
| 7 | J – 4 | 4 | 44°W | 70 | |||
| 8 | E – 19 | 9 | 30°W | 56 | |||
| 9 | H – 1 | 19 | 64°W | 90 | |||
| 10 | H – 3 | -3 | 03°W | 29 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.