Daily Sunspot Evaluation
Observation Sheet Saturday, 13 March 1993
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)
- 4
- Number of spots (f)
- 28
- Relative number (R)
- 68
- Observer
- MB
- Reading
- all checks consistent
- File
- 19930313.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 9 | 56W | 100 | 57W | 1.5 | 57 |
| 2 | FKC – 10 | 16 | 48E | 356 | 47E | 16.5 | 60 |
| 3 | FKO – 13 | -6 | 61W | 105 | 62W | 18 | 54 |
| 4 | BXO – 4 | -8 | 40W | 84 | 41W | 0.4 | 62 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.