Daily Sunspot Evaluation
Observation Sheet Wednesday, 4 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)
- 5
- Number of spots (f)
- 29
- Relative number (R)
- 79
- Observer
- ED
- Reading
- all checks consistent
- File
- 19730404.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 4 | 12 | 12E | 40 | 59 | ||
| 2 | G – 5 | -13 | 64E | 348 | 57 | ||
| 3 | A – 1 | -13 | 25E | 27 | 56 | ||
| 4 | A – 1 | -13 | 53W | 105 | 59 | ||
| 5 | E – 18 | -4 | 28W | 80 | 52 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.