Daily Sunspot Evaluation
Observation Sheet Thursday, 31 March 1960
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)
- 5
- Number of spots (f)
- 71
- Relative number (R)
- 121
- Observer
- FY
- Reading
- all checks consistent
- File
- 19600331.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 39 | 11 | 3E | ||||
| 2 | A – 1 | 6 | 29E | ||||
| 3 | ? – 1 | 10 | 83E | ||||
| 4 | D – 18 | -8 | 50E | ||||
| 5 | C – 12 | -13 | 61W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.