Daily Sunspot Evaluation
Observation Sheet Tuesday, 7 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)
- 2
- Number of spots (f)
- 22
- Relative number (R)
- 42
- Observer
- ET
- Reading
- all checks consistent
- File
- 19610307.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 11 | 4 | 1E | ||||
| 2 | B – 11 | -10 | SE |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.