Daily Sunspot Evaluation
Observation Sheet Saturday, 31 July 1993
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)
- 5
- Number of spots (f)
- 17
- Relative number (R)
- 67
- Observer
- YK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19930731.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 15 | 25W | 20 | 29W | 1.5 | 191 |
| 2 | BXO – 4 | 18 | 14W | 9 | 18W | 2 | 197 |
| 3 | CRO – 6 | -11 | 35W | 80 ⚠ | 33W | 2 | 192 |
| 4 | HR – 4 | 8 | 14E | 341 | 10E | 1 | 193 |
| 5 | AX – 2 | 13 | 15E | 340 | 11E | 1 | 196 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.