Daily Sunspot Evaluation
Observation Sheet Thursday, 3 April 1958
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)
- 18
- Number of spots (f)
- 168
- Relative number (R)
- 348
- Observer
- WG
- Reading
- all checks consistent
- File
- 19580403.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 33 | 33 | 16E | ||||
| 2 | A – 3 | 18 | 14E | ||||
| 3 | A – 3 | 21 | 23E | ||||
| 4 | J – 2 | 27 | 43E | ||||
| 5 | B – 8 | 11 | 46E | ||||
| 6 | ? – 2 | 14 | 85E | ||||
| 7 | J – 4 | -15 | 7E | ||||
| 8 | E – 29 | -17 | 19E | ||||
| 9 | A – 1 | -22 | 59E | ||||
| 10 | A – 3 | -26 | 68E | ||||
| 11 | B – 15 | -26 | 3E | ||||
| 12 | G – 20 | -16 | 11W | ||||
| 13 | A – 3 | -10 | 14W | ||||
| 14 | G – 20 | -22 | 50W | ||||
| 15 | C – 10 | -12 | 70W | ||||
| 16 | B – 5 | -7 | 66W | ||||
| 17 | C – 6 | 7 | 21W | ||||
| 18 | J – 1 | 25 | 7W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.