Daily Sunspot Evaluation
Observation Sheet Wednesday, 25 April 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)
- 42
- Relative number (R)
- 82
- Observer
- ED
- Reading
- all checks consistent
- File
- 19730425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 15 | -6 | 46°E | 89 | 70 | ||
| 2 | A – 1 | -12 | 50°E | 85 | 71 | ||
| 3 | A – 1 | -15 | 57°W | 192 | 69 | ||
| 4 | E – 25 | 11 | 14°W | 149 | 68 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.