Daily Sunspot Evaluation
Observation Sheet Thursday, 28 March 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)
- 11
- Number of spots (f)
- 70
- Relative number (R)
- 180
- Observer
- WG
- Reading
- all checks consistent
- File
- 19570328.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 11 | 1E | ||||
| 2 | C – 3 | 33 | 3E | ||||
| 3 | B – 5 | 23 | 18E | ||||
| 4 | D – 9 | 13 | 26E | ||||
| 5 | A – 1 | -27 | 15E | ||||
| 6 | B – 3 | -27 | 25W | ||||
| 7 | F – 33 | -15 | 27W | ||||
| 8 | B – 4 | -17 | 64W | ||||
| 9 | A – 6 | 29 | 31W | ||||
| 10 | A – 1 | 40 | 36W | ||||
| 11 | C – 4 | 29 | 22W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.