Daily Sunspot Evaluation
Observation Sheet Saturday, 7 July 1973
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)
- 32
- Relative number (R)
- 72
- Observer
- SK
- Reading
- all checks consistent
- File
- 19730707.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 5 | 2 | 01E | 249 | 130 | ||
| 2 | D – 12 | -6 | 24W | 274 | 125 | ||
| 3 | A – 2 | -4 | 31W | 281 | 131 | ||
| 4 | C – 13 | 13 | 20W | 270 | 127 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.