Daily Sunspot Evaluation
Observation Sheet Monday, 12 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)
- 3
- Number of spots (f)
- 15
- Relative number (R)
- 45
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510312.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | D – 10 | 0.33 | 59 | |
| 2 | ? – 1 | 0.98 | 68 | |
| 3 | J – 4 | 0.32 | 333 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.