Daily Sunspot Evaluation
Observation Sheet Saturday, 4 April 1992
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)
- 4
- Number of spots (f)
- 33
- Relative number (R)
- 73
- Observer
- TA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19920404.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 3 | 6 | 26W | 330 ⚠ | 80W | - | 161 |
| 2 | DAO – 9 | 13 | 36W | 290 | 40W | 8 | 155 |
| 3 | CRO – 10 | -18 | 64W | 318 | 68W | 12 | 168 |
| 4 | EAO – 11 | -7 | 55E | 189 ⚠ | 51E | 15 | 154 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.