Daily Sunspot Evaluation
Observation Sheet Wednesday, 18 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)
- 15
- Number of spots (f)
- 82
- Relative number (R)
- 232
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20010718.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 4 | 5 | 28W | 148 | 31W | ~2 | |
| 2 | HS – 1 | 6 | 01W | 121 | 04W | ~2.5 | |
| 3 | HA – 5 | 7 | 11E | 108 | 09E | ~4.5 | |
| 4 | AX – 2 | 1 | 47E | 73 | 44E | ~3 | |
| 5 | CAO – 2 | 11 | 59E | 61 | 56E | ~5.5 | |
| 6 | EAI – 10 | -26 | 54W | 171 | 54W | ~13.5 | |
| 7 | CAO – 7 | -15 | 46W | 166 | 49W | ~4.5 | |
| 8 | HS – 2 | -4 | 21W | 141 | 24W | ~0.5 | |
| 9 | AX – 2 | -26 | 12W | 132 | 15W | ~2.5 | |
| 10 | CSO – 2 | -2 | 01E | 119 | 02W | ~1 | |
| 11 | AX – 2 | -1 | 07E | 113 | 04E | ~1 | |
| 12 | AX – 3 | -1 | 35E | 85 | 32E | ~3 | |
| 13 | DSC – 14 | -25 | 46E | 74 | 43E | ~10 | |
| 14 | FAI – 24 | -31 | 49E | 71 | 46E | ~15.5 | |
| 15 | DSO – 2 | -9 | 71E | 49 | 68E | ~6.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.