Daily Sunspot Evaluation
Observation Sheet Sunday, 14 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)
- 7
- Number of spots (f)
- 49
- Relative number (R)
- 119
- Observer
- WG
- Reading
- all checks consistent
- File
- 19570414.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 5 | 18 | 12E | ||||
| 2 | B – 3 | 24 | 60E | ||||
| 3 | J – 1 | -18 | 73E | ||||
| 4 | A – 2 | -24 | 49E | ||||
| 5 | A – 4 | -22 | 1E | ||||
| 6 | E – 33 | -23 | 29W | ||||
| 7 | J – 1 | -18 | 71W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.