Daily Sunspot Evaluation
Observation Sheet Tuesday, 28 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)
- 8
- Number of spots (f)
- 36
- Relative number (R)
- 116
- Observer
- ET
- Reading
- all checks consistent
- File
- 19610328.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 10 | 4E | ||||
| 2 | A – 1 | 11 | 64E | ||||
| 3 | ? – 2 | -16 | 38E | ||||
| 4 | G – 4 | -18 | 57E | ||||
| 5 | A – 3 | -17 | 49E | ||||
| 6 | C – 11 | -14 | 42E | ||||
| 7 | H – 5 | 7 | 31W | ||||
| 8 | C – 9 | 8 | 19W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.