Daily Sunspot Evaluation
Observation Sheet Saturday, 18 March 1961
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)
- 10
- Relative number (R)
- 70
- Observer
- AB
- Reading
- all checks consistent
- File
- 19610318.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 3 | 3E | ||||
| 2 | J – 1 | 4 | 14E | ||||
| 3 | ? – 1 | -19 | 83E | ||||
| 4 | B – 3 | -24 | 12E | ||||
| 5 | J – 1 | -6 | 53W | ||||
| 6 | A – 1 | 22 | 68W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.