Daily Sunspot Evaluation
Observation Sheet Monday, 30 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)
- 6
- Number of spots (f)
- 24
- Relative number (R)
- 84
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730430.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | -14 | 18W | 86 | 74 | ||
| 2 | C – 12 | -7 | 23W | 91 | 70 | ||
| 3 | A – 2 | -7 | 28W | 96 | 71 | ||
| 4 | A – 2 | -4 | 21W | 89 | 73 | ||
| 5 | A – 1 | -4 | 13W | 81 | 75 | ||
| 6 | H – 5 | 11 | 78W | 146 | 63 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.