Daily Sunspot Evaluation
Observation Sheet Monday, 8 April 1957
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)
- 8
- Number of spots (f)
- 84
- Relative number (R)
- 164
- Observer
- ET
- Reading
- all checks consistent
- File
- 19570408.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 20 | -21 | 48E | ||||
| 2 | D – 7 | -20 | 15E | ||||
| 3 | A – 1 | -20 | 6W | ||||
| 4 | D – 18 | -27 | 14W | ||||
| 5 | H – 5 | -22 | 37W | ||||
| 6 | C – 11 | 15 | 61W | ||||
| 7 | D – 20 | 22 | 35W | ||||
| 8 | A – 2 | 27 | 19W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.