Daily Sunspot Evaluation
Observation Sheet Thursday, 9 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)
- 3
- Number of spots (f)
- 17
- Relative number (R)
- 47
- Observer
- MB
- Reading
- all checks consistent
- File
- 19920409.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSI – 11 | -7 | 15W | 201 | 17W | 11.5 | 154 |
| 2 | HS – 3 | -16 | 37E | 149 | 35E | 06 | 156 |
| 3 | ? – 3 | -14 | 78E | 108 | 76E | - | 158 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.