Daily Sunspot Evaluation
Observation Sheet Friday, 31 July 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)
- 11
- Relative number (R)
- 51
- Observer
- TK
- Reading
- all checks consistent
- File
- 19920731.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSO – 5 | -20 | 12W | 144 | 15W | 45 | 232 |
| 2 | AX – 1 | -6 | 01W | 133 | 04W | - | 250 |
| 3 | HA – 1 | 14 | 14E | 118 | 11E | 4.5 | 235 |
| 4 | HA – 4 | 17 | 28E | 104 | 25E | 3 | 236 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.