Daily Sunspot Evaluation
Observation Sheet Friday, 30 March 1951
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)
- 25
- Relative number (R)
- 65
- Observer
- ET
- Reading
- all checks consistent
- File
- 19510330.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | ? – 6 | 0.92 | 79 | |
| 2 | B – 7 | 0.12 | 132 | |
| 3 | ? – 1 | 0.98 | 248 | |
| 4 | C – 11 | 0.5 | 272 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.