Daily Sunspot Evaluation
Observation Sheet Friday, 30 March 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)
- 3
- Number of spots (f)
- 39
- Relative number (R)
- 69
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730330.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 4 | 12 | 78°E | 38 | 51 | ||
| 2 | E – 26 | -5 | 38°E | 78 | 52 | ||
| 3 | H – 9 | 7 | 23°W | 145 | 50 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.