Daily Sunspot Evaluation
Observation Sheet Tuesday, 31 July 2001
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)
- 41
- Relative number (R)
- 91
- Observer
- ıH
- Reading
- all checks consistent
- File
- 20010731.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 1 | 24 | 69E | 239 | 66E | - | |
| 2 | EAI – 10 | 5 | 69E | 239 | 66E | 11.5 | |
| 3 | HA – 4 | -19 | 15E | 293 | 12E | -1.5 | |
| 4 | DAC – 15 | -20 | 25E | 283 | 22E | 6.5 | |
| 5 | EAC – 11 | -13 | 61E | 249 | 58E | 10.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.