Daily Sunspot Evaluation
Observation Sheet Sunday, 18 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)
- 6
- Number of spots (f)
- 39
- Relative number (R)
- 99
- Observer
- TA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19930718.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRE – 12 | 7 | 28W | 135 ⚠ | 31W | 6 | 185 |
| 2 | HS – 1 | 8 | 47E | 100 ⚠ | 44E | 1.5 | 186 |
| 3 | CAO – 7 | -8 | 58W | 225 | 41W | 8 | 182 |
| 4 | DRI – 14 | 8 | 07W | 184 ⚠ | 20W | 6 | 189 |
| 5 | HS – 1 | -11 | 61E | 106 | 58E | 2 | 187 |
| 6 | AX – 4 | -20 | 64E | 103 | 61E | 2 | 188 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.