Daily Sunspot Evaluation
Observation Sheet Wednesday, 13 March 1968
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
- LT
- Reading
- all checks consistent
- File
- 19680313.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 30 | 75E | 248 | |||
| 2 | G – 5 | 25 | 53E | 270 | |||
| 3 | G – 3 | -18 | 65E | 258 | |||
| 4 | C – 12 | -14 | 5E | 318 | |||
| 5 | ? – 2 | -26 | 82W | 45 | |||
| 6 | A – 1 | -6 | 42W | 5 | |||
| 7 | B – 5 | 15 | 68W | 31 | |||
| 8 | C – 6 | 19 | 31W | 354 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.